Tuesday, July 19, 2022

 

Issue 582: Space Summer Redux, Redux

 

The years just seem to fly by of late, muchachos. I simply cannot believe this little epistle on my wonderful space summer is from 10 fricking years ago! You’ve heard oldsters remark how the days speed by for ‘em. Well, according to neuroscientists, that might be real and not just our imaginations or the effects of ennui out in the suburbs (with which I am well acquainted). Maybe, as we age, the brain’s “clock” slows down, causing external time and events to seem to speed up…

That sure sounds reasonable to me. I cannot fathom how that birthday week of Unk’s in July recounted above could possibly be a decade in the rearview mirror. But what a week it was! As you’ll learn if you read thatun, I spent those days in July recreating the Race to the Moon on Chaos Manor South’s dining room table, drinking margaritas and eating Mexican food, and…to cap it all off, driving hundreds of miles to Chiefland, Florida and imaging hundreds of Herschel objects. Today, just thinking about all that makes me tired.

Back then, though, it was a good tired by the time my week was out. I was only on the verge of my 60s, still pretty hardcore as an observer, and able to stay up till the wee hours—under the stars or not. Ten years down the line? Heck, y’all, I am lucky to make it to 2300 on or off the observing field (my backyard, not the CAV’s Billy Dodd Field these nights). 

Still, this week was once again my birthday week, and what’s a birthday without involving astronomy, or at least “space”? It looked like the former was o-u-t. The weather here on the borders of the Great Possum Swamp was and is horrible. Even if it ain’t cloudy (or thundering and raining, more like), it is miserable. It’s not dark enough to do anything till 2100 at least, and it is miserably hot and humid (and hazy) even then. Oh, and the bugs? They just love your old Uncle—as a square meal!

So…that left…SPACE, THE FINAL FRONTIER. Not with the crew of the fictional Enterprise, but with some real space heroes. What in tarnation is Unk goin’ on about now? Has being over the hill and ready to proceed down the opposite slope deprived him of what little sense he had?

Found it!
I was vaguely thinking the other day I might get my plastic space program going again. It would if nothing else be something spacey I could do in comfort indoors. That thought was quickly followed by me recalling I’d lost the kit I really wanted to build, Revell’s 1/24th scale Gemini spacecraft, when we moved from Chaos Manor South to suburbia. That kinda drew a pall over that idea.

No replacing the Revell either. The long out of “print” kit can be had on eBay but expect to pay a hundred bucks for it. Which didn’t seem reasonable to cheap ol’ Unk given current economic conditions. Oh, well…I guessed that meant the closest I could come to recreating that fondly remembered 10-years-ago week was drinking a Margarita or two at El Giro’s…or maybe just an Ultra down at Heroes Sports Bar and Grill.

And then…and then…sometimes the stars  align. I opened the door to the closet in the New Manse’s office to get something—I can’t remember what and it does not matter—and for some unknown reason, looked up. What should I spy? A familiar box on the very top shelf. Could it be? No…no way! Yep, my “lost” Gemini capsule. And the box next to the kit? The Realspace add-on accessories to fix the mistakes Revell made and add the things to the kit they left out. I figgered this must be some kinda sign I really should build the Gemini capsule.

What to do first? Well, I take this rather seriously. If I’m gonna build a spacecraft model, I’m gonna build a spacecraft model. I’d need to do some research. I still had the excellent DVDs mentioned in the above-linked blog entry, DVDs from Spacecraft Films. I wondered, though, if they might have some more Gemini-related films available…

I was actually somewhat surprised to discover their website is still on the air in this mostly post-DVD age. It is, but has an untended, near-ghost town look and feel to it. Trying to order any of their products takes you nowheres. But that was OK, I still had their Gemini disks and, more importantly, found there’s tons of material on Project Gemini—documentaries, old NASA films, you name it—on cotton-picking YouTube. Tons, campers.

Gemini was a hot rod compared to Mercury...
It was reassuring there was plenty of reference material available, since Gemini (pronounced “Jiminy,” like the cricket, not jeh·muh·nai like the constellation, young’uns) is the redheaded stepchild of NASA. Almost everybody knows about Project Mercury. It was there first, sending Alan Shepard and John Glenn and the rest of the legendary Mercury 7 into space just slightly behind the Russkies. Even folks who don’t know as much about NASA as my cat, have likely heard of Apollo. Gemini? Not so much.

Truth is, that One Small Step of Apollo would have been far too large a leap from Mercury. There had to be a program in-between. Something that allowed us to perfect the vital arts of rendezvous and docking.  But not just that. Mercury was a primitive little spacecraft that depended on batteries. The longest duration Mercury mission was Gordo Cooper’s Mercury 9, Faith 7. After less than a day and a half, the Mercury spacecraft was on the ropes with multiple failures. We’d have to do better to get to the Moon.

Gemini was a considerably more advanced spacecraft. Oh, it wasn’t roomy. There was no room for the crew to speak of. The two astronauts (one of the reasons the program was named “Gemini”) had to endure something akin to spending an entire mission in the front seat of a VW bug. But, yes, the Gemini capsule made Mercury look like a Wright Flyer. All but the earliest spacecraft were powered by fuel cells rather than batteries, and the capsule was much more “flyable,” which it would have to be for rendezvous and docking.

Gemini and the Gemini pilots delivered on that. Not only did Gemini VI and VII rendezvous in space, there were highly successful dockings with the Agena Target Vehicle, five of them over the course of the program.  The first, done on Neil Armstrong’s Gemini VIII mission, was a near disaster, not due to Agena, but due to a stuck thruster on the Gemini spacecraft itself. Armstrong dealt with it in his accustomed cool and competent manner and the mission was deemed a success despite an early landing being dictated by Mission Rules after the thruster problem.

It was with Gemini we began to first catch up with and then surpass the Soviets. Gemini set some impressive records. In addition to those docking missions, Pete Conrad and Richard Gordon’s Gemini XI set an altitude record of 739.2 nautical miles (with the help of an Agena’s engine). On the last Gemini, Gemini XII, Buzz Aldrin made a record-breaking 5-hour and 30-minute EVA. Maybe most importantly, Gemini VII, crewed by Frank Borman and Jim Lovell, set an endurance record of nearly 14 days. That proved NASA’s spacecraft and astronauts could hold up for considerably longer than the time required for a lunar mission.

Post-Gemini, it looked as if it were full-speed-ahead to the Moon for NASA and the consarned Russkies would be left in the dust. Alas, then came the disastrous Apollo I fire that claimed the lives of Gus Grissom (who was the odds-on favorite to be the first man on the Moon), Ed White (the first NASA space-walker on Gemini IV), and Roger Chaffee. That set the Apollo program back twenty months and turned the space race into a little bit more of a race (at least we thought so; the Soviet lunar program was in real trouble). Apollo I notwithstanding, Gemini prepared us for the Moon.

That’s a brief summary of NASA’s Gemini. If you want the complete story, there are plenty of resources including the above-mentioned NASA documentaries to be found on YouTube. Want a book? There are many. Some I can recommend? If you’re a space nut like ol’ Unk, you probably know about Apogee Books. They are still in business and offer an outstanding volume on Gemini. They also have individual books on some separate Gemini missions.

What did Unk need to do to get his own Project Gemini off the ground? I needed a few inexpensive supplies…the usual things required for building plastic models. Much of what I was using 8 - 10 years ago—paints, putty, glue, airbrush propellent—was ready for the trash. Luckily, our local hobby shop (we have a real hobby shop, Hobby Town, in addition to the strange and execrable Hobby Lobby) fixed me right up. Those things obtained, I thought I’d go ahead and do something about the decal situation.

The washing of the parts...
The Revell 1/24 Gemini comes with a tiny, maybe 2” x 2”, sheet of decals. Not only are they few, the included decals are mostly wrong. Also, not surprisingly, the sheet was yellowed and looking brittle nearly 10 years down the line. Luckily, another space modeling goto, Steve, the CultTVMan, is still in business, too. He got me three big sheets of authentic Gemini decals in just a few days…

Just before Unk’s birthday. Which arrived as it always has with fun and foolishness. How did your increasingly aged Uncle celebrate this year? It was not that different from the space summer that decade ago. Oh, no Chiefland…I haven’t been Down Chiefland Way these seven years, so I suppose that is finis for me.  But, no, not that different; there was even an expedition of sorts.

On my birthday eve, I did a sorta spacey thing for Apollo 11 anniversary week by watching Sandra Bullock in Gravity on HBO Max. When it first came out, I remarked here that, while I appreciated being able to watch the pretty Ms. Bullock cavort in her skivvies, I was disappointed in the scientific faux pas in the movie. I hadn’t watched it again since it was in the theatres (which I was amazed to realize was nearly 10 years ago).  This time? The film looked beautiful on the 4K TV…and…I must be gettin’ less critical and cynical in my old age, cause I really enjoyed it.

The big day brought that expedition, to Meaher State Park here on the Causeway across Mobile Bay. Why there? It’s a nice place to activate for (amateur radio) Parks on the Air. Miss Dorothy and I drove out to Meaher State Park on Mobile Bay, which is only about half an hour away, and I made contacts all the way from Maine to Texas and everywhere in-between with my battery-powered 20-watt Xiegu G90 transceiver.

And as a suitably appropriate finish to the day? Well, there was Mexican food. El Giro’s, our ancient haunt back when we lived at Chaos Manor South (and often the site of our legendary Christmas Eve dinners), burned down many years ago. Not long after, they built a new El Giro’s out in west Mobile, which, we found after we moved out here, was barely three miles away from our new home. Yes, sometimes the stars, yes, really do align.

But what about that Revell Gemini spacecraft, huh, what about that? I got it underway, beginning the Saturday before my birthday with the ritual Washing of the Parts (to get rid of any lingering mold-release lubricant). But…I decided what I want to do is Gemini VIII, the Armstrong mission. To that end, I ordered the Apogee book on that mission to use as reference and am cooling my heels until it arrives. Rest assured; I will update you as we go along, at least occasionally.

I thought I was done with long, long blogs, but I’ve just kept going and going like the dadgum Energizer Bunny. We are well and truly out of time and space. Almost…

El Giro's!
What’s next? For my personal space program? When I finish Gemini VIII? As I mentioned here, the Launch Umbilical Tower I build for my Airfix Saturn V was destroyed during our move to the suburbs from Chaos Manor South. And at this time, it appears the Saturn V may be gone as well. Oh, there are a few more boxes for me to look it and I have my fingers crossed, but I am not overly hopeful.

So, while it might be covering old ground, I think I might do another Saturn and that LUT too. I have the feeling being able to work on the latter for longer stretches and without any pressure to finish may make it a more fun and less harrowing experience. Be that as it may, Uncle Rod’s Little Space Museum is opening up again.

Astronomy-wise? Amateur astronomy-wise? I have but two words: “Destination Moon.” Unless the weather becomes a lot more comfortable and clear a lot sooner than I think it well, deep space, the deep sky, will wait a few months more.


Monday, June 20, 2022

 

Issue 581: The Thirty-Seven-Year-Old Telescope Redux

 

I could have called this one “The Fifty-Year-Old Telescope” or maybe “SHE LIVES!” Perhaps even “Sometimes You Haven’t Moved on After All.” What in tarnation is Uncle Rod goin’ on about now? Has somebody been spikin’ his Geritol with Rebel Yell? All shall be revealed, muchachos, all shall be revealed…you just have to exercise a little patience with your increasingly addled old Uncle.

Anyhow, I wanted to get a June 2022 issue of the blog up, but it was clear now was not the time to try to continue one of my two current observing projects, “Urban Astronomer” and “The New Herschel Project.” Why? You know how it’s been in most of the country in mid-June—hot, and I do mean h-o-t-t hot. It’s probably been bad enough in your part of the USA, so you can imagine what it’s been like way down here on the borders of the Great Possum Swamp.

If you can’t, I’ll spell it out for you: “Feels like 95F (plus) way after sunset.” Oh, and that light pollution-scattering haze from stagnant high-pressure systems? Lookin’ up at the sky has been like seeing stars immersed in a bowl of milk. So, it ‘peared it would be “No blog for you!” Till early one hot evening I was walking back to the main house from my radio shack/workshop, the vaunted Batcave.

It can be boring out in here suburbia if’n you’re retired…well, unless you have an amateur radio license (your ol’ Uncle Rod has had one since 1969). There is no shortage of things to do on hot days and hazy nights if you can get on the air. Especially if you can do so from the air-conditioned comfort of a shack like the Batcave, which I had a contractor finish-off about four years ago (it began life as a detached garage). Anyhoo, having pulled the Big Switch on my beloved Icom IC-7610, I was heading back to the house to inventory the Rebel Yell <ahem>, when my eyes lit upon the Thirty-Seven-Year-Old Telescope.

I wrote a blog entry about this old instrument some 14 years ago. If you’re interested, read the story of the telescope that began life as a mirror kit I received as a graduation gift in 1971. Ol’ 37 was a good telescope, and I used her purty frequently for six years. But then she met her near demise.

Miss Dorothy and I decamped from legendary Chaos Manor South for the suburbs following my early retirement at age 59 in 2014.  Ol’ 37, of course, went with us, but I never quite found a place for her. She spent some time in the not-yet-finished Batcave. And she spent some more time in a corner of the sunroom. Until…

I’ve made no secret in these pages I had a difficult time adjusting to retirement. Very difficult. I went from 30 years as an engineer working plenty of 12-hour days to “Well, whatta I do now?” I won’t say more about that today, since I’ve mostly come to terms with it, and you’d just find the details boring. Be that as it may, 2015 was a particularly tough year for your old Uncle…

One afternoon in the summer of that misbegotten annum, I nearly knocked Ol’ 37 over in the sunroom. At the time, I had very little patience for anything, had had enough of the scope being constantly underfoot, grabbed her up, took her to the carport, and stashed her on a shelf. A shelf open to the elements, though, of course, partially protected in the carport.

Operating Position Number One at W4NNF...
By the time 2016 was half over, your correspondent was beginning to feel better, but I kinda forgot about the scope. Oh, I’d see her when l’d drive in, and sometimes I’d think, “Really ought to do something about poor Ol’ 37,” but usually I looked right through her. The only good? On that day in ’15 I had at least exerted some effort to seal both ends of the tube with plastic sheeting and masking tape. And the shelf was, yeah, somewhat protected. But… Nearly seven years passed with my old friend sitting on her dusty perch.

Then, just a few days ago, as above I was walking back to the house from the shack and my eyes lit upon the scope as they often did. Something was different this time, though. I began to think about the wearyingly long years the poor thing had sat on that wretched shelf waiting for a taste of starlight that never came. I was suddenly overcome with remorse and the resolve to do something about it. I grabbed a step ladder, got her down, and brushed some of the thick layer of dust and grime off before heading to the ‘Cave with her.

As you won’t be surprised to hear, after seven years the plastic and masking tape sealing the tube had deteriorated to the point it all crumbled when I began to carefully remove it. Frankly, I was afraid of what I might find. Would I be years too late to save her?

Nope…looking down the tube I could see the primary mirror was dusty and badly in need of a bath, but not far gone at all. The same was true of the secondary. I removed the primary and the secondary from the tube by the simple expedient of pulling the whole spider assembly (a nice curved one that produces no diffraction spikes) and primary cell. I stashed ‘em in the kitchen for cleaning after I did something about that horribly grimy tube.

I didn’t take a picture of the tube in “before” condition, campers. Frankly, I was embarrassed to share that with you. The dust of years…spiderwebs…bug poop… It was so bad the only way to attack it was with a garden hose and rags and a bottle of Dawn dishwashing detergent. As you can see, she cleaned up rather well. Oh, the girl will never look as good as she did in just-painted condition, but is fine.

I could grab a can of Krylon and repaint the tube. However, I have decided against that…maybe it’s best to let the OTA be and serve as a cautionary tale for your old Uncle concerning being too hasty. I should have stopped, counted to ten, and returned Ol' 37 to the Batcave rather than exiling her to the carport.

Would the optics live again? I cleaned them carefully with water and a little Dawn and, yes, they would. They are no longer pristine. There are a couple of spots on the secondary. And on the primary too. There’s also a “sleek” that’s actually more of a scratch on the periphery of the main mirror. However, that has been there since the mirror returned from the fricking-fracking coater, Spectrum, who put it there. Luckily, it affects nothing.

On the operating table...
What else? The focuser was in surprisingly good shape, though the nice rubber friction-strips on the knobs had long since rotted away and fallen off. Focus action was as smooth as ever. A couple of the eyepiece setscrews were a mite rusty, so I blasted them with a staple in the shack, DeOxit, and they were, if not like new, at least better.

Finally, I mounted a Synta-style finder shoe on the tube with double-sided tape. Yeah, there was a Telrad base on the OTA already, but I was surprised to find I no longer have a working Telrad (!). I’ve switched over to Rigel Quick Finders and didn’t have an extra base (I could locate) for one. I figured a Synta red dot sight would be enough for goto alignments.

Time to get the old gal’s optics reinstalled. Assembly was easy enough…though it was a minor struggle to get the wooden primary cell back in the not quite round tube and screwed down. Nothing a few minutes and a little patience couldn’t see to, though. Naturally, after removing and reinstalling both primary and secondary mounts, the scope would need to be collimated. I went up to the main house and fetched my Celestron combo Cheshire/sight-tube. And stopped dead in my tracks.

It had been a long, long time since I’d collimated a Newtonian that needed anything more than a minor touch-up. My single other Newt, Zelda, a 10-inch GSO Dobsonian reflector, holds her collimation remarkably well. Since we haven’t traveled to any star parties or even the local dark-site since Covid began, she hasn’t needed any attention at all. So…to my embarrassment, I realized I’d kinda forgotten what to do. Embarrassing, yes, but I recalled I’d done a detailed article on collimating in these very pages years ago. My own words would see me through.

Indeed, they did. The secondary was only off a mite. And the same was true, rather surprisingly, for the wooden primary cell. In about five minutes collimation was done and it would be possible to get the old girl under the stars and see how she might fare. Frankly, even after rereading the above article on ol’ 37, I didn’t have much memory of what her images were like. So, I was curious to say the very least.

When would I satisfy that curiosity? Why, the very next evening. I had initially intended to wait till late afternoon to set the scope up, but knew if I did, it might not get done at all. The heat and humidity at the tail-end of a Possum Swamp afternoon would be just too much for your increasingly feeble Unk. Now, when I was a boy, setting up a telescope early was usually a recipe for disaster. I’d get distracted by a TV show, and when it was over, I’d be reluctant to walk out into a completely dark yard for fear of what might be waiting with the scope. Better to assemble the Pal Junior in early evening and stick by her side as the shadows lengthened.

Not lookin' bad at all...
In these latter days, though? Neither TV, nor the Little Grey Dudes from Zeta Reticuli II, nor Mothman, nor Lon Chaney Jr’s Wolfman has a hold on me. That’s one benefit of getting older, I suppose—if magic of any sort, good or bad, going away could ever be a benefit. So, up went Ol' 37 on the cusp of a morning that wasn’t yet violently hot.

No, it wasn’t terribly not, not yet…but it was hot enough I went for “easy.” My beautiful Losmandy GM811G ain’t tough to get set up, but nothing (well, no goto-equipped GEM) is easier than the Advanced VX. So, the Celestron mount it was. In addition to the ease of erecting it, it has the advantage I know its hand control and its quirks in general so well I can practically align it with my eyes closed. On a hot and breathless evening like the one sure to come, I didn’t want to fool around with remembering which button to push. OK, mount up, Ol’ 37 on mount…a little balancing, and we was done.

Well, almost. I hopped down to Publix on this warm Sunday morning for a 2025 button cell battery for the SkyWatcher red-dot finder and a couple of shower caps to serve as Ol’ 37’s aperture covers. That accomplished, I had to admit she didn’t look half bad. No, not bad at all. But the only proof in the astro-pudding is an evening under the stars. I’d wait for that before getting more excited about the old telescope’s apparent resurrection.

And wait Unk did. This time of year, it’s almost 2100L before it’s dark enough to begin a goto alignment. “Oh, well, maybe it’ll have cooled off by Astronomical Twilight.” Nope. Walking out of the house was like walking into that proverbial steam bath. But I did persevere, for a while anyway.

How did it go? I’ll give ya the good and the bad…

The Good…

As above, I honestly didn’t have a clue what to expect of this old mirror begun by moi and finished by talented ATM, Pat Rochford. But it was just fine. No, more than fine, darned good as a matter of fact. As is strangely often the case down here of late, the seeing wasn’t really great despite the high pressure we were under. Advancing front? I dunno, but near as I could tell, the star test was pretty good.

The focuser worked as well as it ever had, easily coping with a 35mm TeleVue panoptic. Due to the quality of my alignment (below), I figgered I’d better stick with a low-powered finding eyepiece.

Maybe best of all? Being on the field with a white-tube Newtonian telescope brought a flood of memories rushing back. Ol' 37's aperture was larger than that of the Pal Junior and the mount far more sophisticated, but all-in-all, the experience was much like what I remember of that long-gone eve in the Swamp.

The Bad…

The SkyWatcher BB gun red-dot sight was nowhere. I could only get it adjusted roughly, so it barely coincided with what was in the eyepiece. And the more I fiddled with it, the worse it got. With sweat dripping into my eyes, I decided a “good enough” goto alignment was, well, good enough.

She lives!
It had been a long time since I’d used a Newtonian on an equatorial mount, and, good God, those changing eyepiece positions are a pain. Yeah, I could rotate the tube in its rings, but the rather plebian Synta-made tube-rings on Ol’ 37 mean doing so is a recipe for disaster. The tube will want to slide out of ‘em and I will want to kick the tripod in the process, ruining my goto alignment.

The collimation could stand a touchup, but I wisely decided this miserably close night was not one for essaying that.

Did I mention it was hot and humid?

Which doesn’t mean I didn’t see a couple of cool things. While the haze was growing steadily, both M13 and M3 were nice. Going from the 35mm Panoptic to the 8mm Ethos (once I figured out I’d need an extension tube for it to come to focus) delivered some rather convincing resolution, even of tight M13. Certainly, I’d have been thrilled to see the ball of stars actually looking like a ball of stars on the long-ago night recounted in the link above. Going from 4-inches, even to include a 4-inch refractor, to 6-inches really does make a difference.

M13 viewed for a fair length of time, I decided to pull the Big Switch. Observing is supposed to be fun, after all, and I was beginning to feel miserable. Inside with a cool sarsaparilly, I recovered and planned what’s next for the old telescope.

"Next" is order a Quick Finder base (from Scopestuff, my usual source for such things). That will make a huge difference. When will I give Ol’ 37 another chance? I won’t wait for cool weather—which might be a long time coming—but I will wait for better than this.


Sunday, May 08, 2022

 

Issue 580: Urban Astronomer Night 1, Burning Heart of the Hunting Dogs

 

Yeah, you don’t have to tell me the ol’ AstroBlog missed another few months. I was all fired up to get back on a regular schedule in February, but... That obviously didn’t happen, and we missed February, March, and April. None of which was by design, muchachos. 

Alas, in February and March your broken-down old Uncle’s health or lack thereof was once again a factor. A big one. In April, I was feeling better, almost like my old cantankerous self, but I had a big responsibility that month, the 2022 Mobile Hamfest. I am the president of the Mobile Amateur Radio Club, and the hamfest, which we’ve been putting on at least since the end of World War II, was job numero uno for me and my fellow officers.

But now it’s May, and I actually feel even better than I did during hamfest month (knock on wood) and am ready to get the blog on the road again, THIS TIME FOR SURE, with a brand new (in a way) observing project. So, what happened to Unk’s last big observing idea, The New Herschel Project, which was to be my quest to observe the Herschel 400 objects from my backyard with a 6-inch telescope? “Nuttin’ honeyis what.

Those lingering health issues that stretch all the way back to 2019 is why. It is still going to happen, though, and will run concurrently in these pages with the new one.  I’ve found my observing is most productive these days when I’ve got a couple of things to work on. So, expect to see “The New Herschel Project Night 4” here before long. But the new one? Unk’s new quest? It came to me in a flash one cloudy evening.

The thing with your old Unk when it comes to observing projects?  The successful ones are rarely those I struggle with and dig for. They are the ones that come as if by magic. Like the morning a few <ahem> years ago I awoke with the idea of observing every Cassiopeia open cluster my 12-inch Dobsonian, Old Betsy, could reach. An abbreviated version of that project appeared some years later as a chapter in my book The Urban Astronomer’s Guide (2006). The point is I didn’t agonize over anything; “The Cassiopeia Clusters” just bubbled up out of my subconscious.

And speaking of that book, while I will readily admit it’s not perfect, I think it is pretty darned good and is the one book of mine I am 100% happy with (though the Second Edition of Choosing and Using a New CAT comes close). Does it sound like Urban Astronomer had been on Unk’s mind? It really hadn’t. Nevertheless, just as on that long-ago dawn at old Chaos Manor South, an observing project, one involving that book, sprang from Unk’s mind (such as it is) Athena-like.

Like Pallas, this idea was fully formed and didn’t take any ruminating:  I’d revisit all the objects from Urban Astronomer. I’d also try to stay true to the book’s small scope emphasis. While some of the Urban objects were observed with my (now gone) 12.5-inch Dobsonian and C11, most were viewed with 8-inch and smaller telescopes, many with 4-inch and 6-inch Newtonian reflectors.

Unk figgered a 6-inch refractor would be a good compromise. More oomph than Urban Astronomer’s old 6-inch Newtonian, but still true to the small-aperture spirit of the book. Of course, my 8-inch Edge SCT, Mrs. Emma Peel will get her share of starlight. If neither of those two proves sufficient for a target? I still have one larger-aperture instrument, my 10-inch Dobbie, Zelda, to call on if and when needed. But the idea of using the 6-inch refractor, Big Ethel, for at least part of the project was appealing. I was curious to see what she could do with the urban objects from my backyard—and curiosity is a very necessary ingredient in any of my projects.

First step in getting The Urban Astronomer Project off the ground was putting together an observing list of the book’s objects. I had a SkyTools 2 format observing list posted online for years. Unfortunately, its location was the files section of the Yahoogroup devoted to my book, which is, of course, long gone, vanished into the ether with the rest of the vaunted groups. I searched my hard drive, but didn’t find a copy. What I did find was a Word format list of the book’s DSOs.

Being lazy, Unk really didn’t want to sit down and manually key-in every one of those dadgummed 154 objects, though that wouldn’t have been that bad.  So, I said to myself, “Self, the Deep Sky Planner 8 program is supposed to have a pretty good import function. Worth a try, anyhow.” I saved the Word file as a plain text document, opened DS8, went to “import,” and <boom> I had a DSP observing list in just a minute or two. Frankly, I was amazed it had been so easy, but I shouldn’t have been. Deep Sky Planner is one of those few astronomy programs that do everything right.

I’d already decided on a scope for the project, Big Ethel. The only question was the mount. But that wasn’t much of a question either. The big refractor is usable on my Celestron Advanced VX GEM mount. She’s a little shakier on the VX than I’d like, but not bad at all. More problematically, if you send the AVX to an object above about 75 – 80° altitude, you run the risk of crashing the OTA into a tripod leg. So, my Losmandy GM811 GEM it would be.

Or so I thought. My latest assignment for Sky & Telescope wrought an immediate change in gear lineup. I was engaged in doing the S&T Test Report on Celestron’s new dew heater system for SCTs (look for it soon), and I’d obviously need to use an SCT, a Celestron SCT, for that. Checking out their Smart Dew Controller’s Celestron-specific functions would require a Celestron mount and Celestron software (CPWI), too. So…

Since, I’d be out with the Edge 800 and the AVX mount working on the Test Report, I thought I might as well piggyback the first night of The Urban Astronomer Survey on that.  I do need to get the refractor and Losmandy mount into the backyard and check them out after another long period of disuse, but that will be “next time.”

Equipment settled, all that remained was to decide upon my starting place in the sky. I’d originally, back in February, intended that to be Orion. Specifically, Chapter 9, Tour 1, “Return of the Hunter.” But, suddenly, it was May and the big guy was down on the horizon at dark. It was spring…glorious spring…and where better to start than Chapter 6, Tour 1, “Burning Heart of the Hunting Dogs”? Not only does that include some truly archetypal spring deep sky objects, it’s the first of the book’s sky tours and thus seemed a perfect place for us to begin our journey.

If you have the book, follow along with it. If you ain’t got the book, why ain’t you? Just kiddin’…all are welcome to join our little expedition whether they have contributed to your parsimonious old Uncle’s Rebel Yell fund or not.

So came a clear night. One of those currently rare clear nights down here on the borders of the Great Possum Swamp. Oh, it wasn’t perfect…there was a thin crescent Moon riding high and casting shadows on the Earth below, humidity was at 60% and rising, and there was haze aplenty. But it was OK. And it had been obvious enough it was going to be OK to impel me to get Emma and her AVX mount into the backyard late that afternoon. It was hot as the day waned, not punishingly hot, but a foreshadowing of things to come in just a month or two. I got the scope set up without breaking too much of a sweat.

Were we ready to go? I hoped so...
When darkness finally came—damn this DST—I threw the switch on the mount and hoped for the best. I was worried, you see. What was to worry? Well, that afternoon I’d been reviewing the manual for the above-mentioned Celestron dew controller. It mentioned that in order to monitor the heater system with a NexStar+ HC, I had to upgrade to recent firmware. “Oh, here we go…”

I’ll admit I hadn’t updated the AVX MC or HC in years. In at least five years, y’all. There really wasn’t any reason to. Mount worked fine, and none of the minor improvements in the Celestron firmware I’d read about seemed to apply to me. Last time I’d upgraded anything was shortly after I got a Celestron StarSense. I did update that, since I’d been told it was a must for the thing to work right. But that was well before 2017

Hokay, what will be, will be. I downloaded CFM, the Celestron Firmware Manager. I vaguely remembered the last time I updated an HC that Celestron had gone to a Java app that somewhat automated the process, but recalled no details.

“Alright. Got ‘er downloaded. Zip file. I’ll just extract it into a new directory and have a look-see. Wait. What the hail is this? A .jar file?!  What was I supposed to do with that? How did I extract it? With what? I started looking for an app to expand such files, but then a small light went on in Unk’s increasingly confused noggin. Celestron’s instructions were clear: Click on the jar file and CFM will run. No extraction required. So why was I getting “Which app do you want to use to open this?” instead? Wait. Did I even have Java installed on the laptop?

A quick visit to the Java website revealed, no, there was no Java on this here computer. Installation of the latest version got us back on the road again. Sure was glad I'd gone over the manual one last time that afternoon and found I needed that update. If I hadn't, 'twould have made for a disastrous comedy of errors out in the dark.

Anyhow, I connected the AVX HC to the Windows laptop (with a serial cable; it’s an old +HC), powered up the mount, and started CFM. It immediately found a NexStar+ HC and began the upgrade. Only fly in the ointment? During the process, Wilbur, our rascally ginger cat, tried to bite the serial cable in two.  Wilbur corralled and HC done, I instructed CFM to look for another “device,” the mount (the mount's motor control board, that is), and update it. Which it did. Or said it did anyhow. You know your ol’ Unk is all about “trust, but verify.”

I disconnected AVX from the PC and booted the Advanced VX and it came right up, albeit with a sign-on message a little different from the old one. But a sign-on message nevertheless. I checked my location in the HC and sure enough, it was somewhere way to the west. Maybe Torrance, CA. I reentered lat/lon, time, time-zone, etc. and thought we might be ready to go. I did make a note to myself that the update had probably wiped-out my PPEC recording, but I would worry about that some other day—er… “night.” The mount seemed OK with the new firmware, but only its behavior under the stars would tell that tale.

The Celestron dew system, which you’ll learn all about in the aforementioned Test Report before long, had taken little fiddling or head-scratching on the part of your Uncle to get going. But it was Something New, and by the time I was done setting it up, it was dark and I was anxious to begin wandering the spring stars...

Power turned on, the AVX started her alignment, and we were off. I had to reject an alignment star here and a calibration star there thanks to spring foliage, but that was just OK. When I punched “M 003” into the HC, the AVX whirred, took off, and when she stopped the king glob of spring was centered in my 13mm Ethos and looking mighty nice. Plenty of resolution, which increased when I switched in my ol’ 8mm Ethos—under the haze-scattered light pollution, more magnification rather than less was better. That was something I learned on those long-ago nights in the early 1990s when I was beginning the observing that would eventually go into the book.

I spent some time thereafter experimenting the heater system, to include viewing its status—things like its current-draw and the dew-point temperature—on the HC and, later, on Celestron’s CPWI software running on the laptop. Worked jus’ fine, but I’ll say no more about that here, though. If’n you’re interested, read all about it in a forthcoming issue of Sky & Telescope.

That done, it was time to tackle my little list, which I did in almost the same order they are presented in The Urban Astronomer’s Guide (I've reversed M81 and M82 here; everybody looks at M82 first).

The Objects:

The Croc on a long ago night..,
M94:  Back in the Chaos Manor South days, I called this magnitude 8.2 SA galaxy “Old Faithful.” That’s because this 10’ across magnitude 8.2 fuzzy is small enough and bright enough that it pops out of the poorest skies in almost any telescope. In the book, I mention how easy it is to find, positioned almost midway between Canes Venatici’s two bright stars Cor Caroli and Chara. Of course, in these latter days when everybody’s CAT uses a goto telescope, that doesn’t matter. What matters is how easy M94 is to see. If you live under compromised skies and want to see a spring galaxy, this is where you begin.

How does it look? Back in the supposedly glorious day, I commented the galaxy looked distinctly stellar in a 4-inch telescope at low power and that at higher magnifications the small disk brightened smoothly to an almost stellar center, the galaxy’s fiercely bright elongated core, which has given this object its common name, The Croc’s Eye Galaxy.

Another comment I made in the book concerned how much this galaxy looks like a small, unresolved globular star cluster. And that just how it appeared at 175x in the Edge 800. There was that preternaturally bright core (the “burning heart,”) and haze surrounding that, fairly extensive haze. If I stared long enough, I could almost convince myself I was resolving stars in that haze. Just as astronomers of old, like Willie Herschel, convinced themselves they were seeing stars in far distant galaxies.

Wow! What a trip down memory lane. I hadn’t viewed 94 in a long, long time, and it almost felt as if I were reliving one of the nights of “From City Lights to Deep Space,” the columns in my old Skywatch newsletter upon which (some of) Urban Astronomer is based.

M51. Next up, a toughie. Messier 51, the Whirlpool Galaxy, is such a renowned and beloved object and one that presents such detail from dark sites we forget it’s a challenge for urban and suburban astronomers. In the book, I warned my readers the Whirlpool looks nothing like its pictures if you’re observing from compromised skies.  In the city, it and its interacting companion, NGC 5195, were merely two blobs, a bright one and a dim one; nothing more.

Don't expect this from your bright backyard.
On this latter-day night, the story was, alas, the same. Given the haze and my no doubt much less acute eyes 30 years down the line, I didn’t expect much better. Even with an 8-inch and Ethoses in place of a 6-inch and Plössls.  I wasn’t disappointed, then, to only detect two blobs. On a better night here, especially with Zelda, I can see a little more than just the bright cores of the two, but not this night. That was OK; I’d successfully visited M51 and NGC 5195 (which was not easy to see).

M106, a big, 17.4’ x  6.6’, but bright, magnitude 8.3, SAB galaxy, is, as I opined in Urban Astronomer, less frequently visited and probably less well-known than nearby M51. Which is a shame, since it really looks better in small city-bound scopes. With my homemade 6-inch Newtonian back in the day, the galaxy was visible with direct vision. It was mostly just a bright, round fuzzy, but I thought I noticed some elongation. 

The same was true at first with Emma. But then I began to see more. The core wasn’t just elongated, but strongly elongated. And there was a patchiness that hinted at 106’s somewhat odd-looking spiral. If you haven’t visited this one in a while, do yourself a favor and get after it with a scope tonight.

M63, the famous Sunflower Galaxy, can be a real beauty, showing off at least hints of its big spiral and the dust patches that give it the sunflower appearance. On the time-washed Chaos Manor South night I viewed M63, a magnitude 8.6 SA spiral that subtends 13’ x 7’, I did it in style with long-gone Old Betsy, my beloved 12.5-inch Dobsonian. In that telescope in a 12mm Nagler eyepiece on a relatively good city night, I was astonished to see not just a bright core and a strongly elongated disk, but considerable hints of spiral structure.

This night? I stayed with M63 for some time, struggling for detail, but the best I could come up with was a subdued core, an elongated disk, and the barest hints of some sort of dark detail in that disk. I think I’ll revisit this distant giant with the 10 inch, Zelda, before spring is out.

The EXPLODING Cigar Galaxy...
M82 is even more well-known than M63. This is the Cigar Galaxy—the Exploding Cigar Galaxy, my daughter Elizabeth used to call it.  It’s a magnitude 8.4 near-edge-on that’s been badly disturbed by an encounter with another galaxy (likely M81). There are dark dust lanes crisscrossing the disk, and, with the color Mallincam, I’ve seen red-hued matter spilling out of the center and coursing across countless light years.

On that Urban Astronomer night of the Hunting Dogs, the galaxy was much more modest, but still a treasure. Most of the time, M82 was just a featureless cigar, but by sticking with it and doing my best to keep ambient light out of my eyes and off the scope, I was sometimes able to pick up those crazy dust lanes and patches. It was the same this night. Oh, M82 was bigger and brighter with Mrs. Peel than it had been with my 4-inch Palomar Junior reflector, but initially that was all.  It was at first just that gray whisp of a cigar, but the dark patches put in an appearance as the night grew older and a little darker.

Back in the Chaos Manor South days, there were times M82’s companion galaxy, M81, was completely invisible with the Palomar Junior or my 6-inch Newt. I did get an OK look at it with the NexStar 11 GPS one night. Oh, I couldn’t see those far-flung gossamer spiral arms—the only superior visual look I’ve had at those has been from the Texas Star Party—but it was good enough. A big, elongated disk that wanted to reveal some sort of detail

I was frankly surprised what Emma did with M81. I expected to have to fight for the galaxy on this night, but no. The big magnitude 6.9 SA spiral was starkly, and I do mean starkly visible with the 13mm Ethos at 107x. Not just that; I’d say it was easier to pick up a little detail in the galaxy than it had been with the C11 at Chaos Manor South.

M101, the Pinwheel Galaxy, is what I called a “been-there” in the Chaos Manor South days. An object difficult enough you have to be satisfied you’ve seen it at all, that you’ve been there. The problem with the Pinwheel Galaxy? It’s not that it’s dim. It’s a respectable magnitude 7.9. It’s that this SAB is face-on to us and is large—28’ x 26’. “Big” and “face-on” galaxies are the toughest of all. Their light is badly spread out and their surface brightness terribly low.

From an observing site in the Possum Swamp suburbs only a little worse than my current digs here in Hickory Ridge, M101 was nearly impossible with the NexStar 11 GPS. All my tricks—dark hood, jiggle scope, averted vision, etc.—were required to turn up a “[A] vague, nebulous ball 10’ across.” Would Emma do as well? She did, or at least I think she did…I am pretty sure I saw an elusive something in the field of my 16mm “Happy Hand Grenade” 100-degree AFOV ocular. Maybe.

We end this excursion with the famous Owl Nebula, M97, a relatively large 3’ diameter magnitude 9.9 planetary. This was another Urban object I turned my old C11, Big Bertha, on. With an OIII filter it was not a problem. I could see the nebula easily, and the big prize, the two dark patches than form the bird’s eyes, were, while not exactly easy, visible—they tended to swim in and out of view. Guess what? The same maintained this night with 8-inch Emma. In fact, I’d say the eyes were easier than on that evening of yore. Was the seeing steadier? The OIII filter I was using better? The eyepiece (Ethos) superior to my old 12mm Nagler? Maybe all of the above.

And, so, our cosmic tour bus has pulled into the station. Thanks for travelling with us. Be careful getting off the bus; the night is old, and the Moon is down and it is dark. Rebel Yell will be dispensed in the lobby to all comers. And please join us for our next big outing, “Lion’s Den.”


Friday, January 28, 2022

 

Issue 579: Welcome to 2022 aka “What Could Happen?”


2022? I hope things will, barring an alien invasion, the zombie apocalypse, or an asteroid strike (and I don’t discount any possibilities anymore), be getting back to normal. Course, that’s what I thought 2021 would bring. It obviously wasn’t quite that, but it was Year Two of The Return of the Little Old Blog from Possum Swamp. I’d got this-here Astroblog stabilized on a mostly, if not quite, monthly schedule, and that was at least one thing that was getting back to normal, muchachos.

Anyhow, I’ve got what I think will be an exciting series of blog articles lined up for 2022. They will be observing-oriented, and will depend on the weather to some extent, but I hope “at least every month.” IOW, “steady as she goes.” This time, however? January is the annual recap of my blog-centric astronomy year. Hey, y’all, I’m just happy there’s anything to recount.

January 2021

January was just what you are getting’ here today, a recap of your old Uncle Rod's past year. Which was not a bad one. The lockdown definitely encouraged me to start thinkin’ about this blog again, and slowly, ever so slowly, bringing it back online more regularly. I was pretty sure 2021 would not bring a return to normalcy, as in me going to star parties. I foresaw yet more staying at home and observing from the backyard, but I was used to that already.

I’ve been more of a backyard/club-site observer since 2016 than a star party monster. 2016 was what a dear friend (you know who you are) dubbed “Uncle Rod’s Farewell Tour.”  I did star party after star party as a speaker, seemingly spending more time in the air than on the ground. I found as my mid-sixties came over the horizon, I didn’t want to do that anymore.

March 2021

Missed February but was back in March for the return of my old friend, Charity Hope Valentine, an ETX with whom Unk has shared more than a few adventures.  After she had been in her case at the New Manse untouched for several annums, Unk finally had the good sense to get her out in the backyard again. Before doing that, I had replaced Charity’s LNT battery (she’s an ETX PE), never a pleasant task, and figgered she was ready to go. Unfortunately, under the stars the little Mak had fits. Her Autostar display would disappear. Sometimes the HC buttons wouldn’t work. Occasionally, the Autostar would reset itself. Bad juju for sure.

A little troubleshooting right there out back with the yard floodlights on revealed the problem. Fifteen years down the line, the Autostar’s cable was finis. The insulation was dried and cracking and in places entirely gone. One of my long-time goto astro-dealers, Agena Astro Products, supplied a new one. With it plugged in, it became clear Miss C is ready for another 15 years in her inimitable neurotic fashion and might even outlast ol’ Unk.

June 2021

No April or May either, but that was pretty much due to the incredibly punk spring weather here on the borders of the Great Possum Swamp. June was not much better, but Unk was at least back with an update on doings ‘round the New Manse. Chief among those things? How much I was enjoying Phyllis Lang’s new version of her long time hit, Deep Sky Planner (8).

I’ve long been a fan of observing planners, which are essentially huge databases of objects that allow you to produce observing lists easily (and do, as they say on TBS late at night, “Much, much more!”).  In fact, the vaunted Herschel Project could not have been done in just three years without the aid of a planner, which easily showed me what I’d observed, what I still needed to observe, and when I could observe what I needed.

Much of the Project was done with SkyTools 3 (now in version 4). And it is a fantastic program. However, my more casual observing programs of today are really a better match for Deep Sky Planner (not that you can’t essay the most ambitious projects with it). Which is a way of saying the new SkyTools 4 is kinda over your silly old Uncle’s head. Things I really like about DSP? Large fonts that are easy on my aged eyes, and the fact it works with my fave planetarium program, Stellarium.

There was also some not-so-good I reported on. My Edge 800 and Advanced VX had taken a bath in the backyard thanks to a failing Telegizmos cover. Said cover was admittedly five years old, but I didn’t expect it to give up the ghost in such dramatic fashion. Both the C8 and the mount head had considerable moisture inside.

The C8 was easy enough to fix, Unk pulling the corrector plate—something he’s done a few <ahem> times to SCTs over the decades—and drying Mrs. Emma Peel off. The AVX was a bit dicier. Unk disassembled the mount head, dried the PCBs out, and hoped for the best. Indoor tests revealed the AVX was fine, but due to a stormy Gulf, testing under the stars would have to wait a while.

July 2021

Unk was on schedule with an entry that recounted some good times with yet another edition of The Reminiscences of Uncle Rod. This time about the 2000 Deep South Regional Star Gaze. That was notable because it was perhaps the last good DSRSG at its old home at the wonderful Percy Quin State Park in Mississippi. Of other interest? Mention of George Kepple’s Astro Cards—index card finder charts for locating deep sky objects.  Unk purchased a deck of ‘em at the star party and has been using them frequently for two decades since. They, in fact, deserve a blog entry of their own someday.

August 2021

I summed it up right from the get-go: “Another hurricane, Hurricane Ida, has come into the Gulf to trouble your silly old Uncle, muchachos…Nothing has changed since July regarding the endless nights of clouds.”  So, there was no observing to be done. What was on Unk’s mind otherwise?

The Herschel Project, thanks to a couple of nights watching some old DVDs recorded during the go-go days of the Big Enchilada. As you know, I never got around to assembling the Project blog entries into a book ala’ Julie Powell’s Julie and Julia…so this article will have to do, an executive summary of the Herschel Project, Unk’s quest to observe all 2500 objects discovered by Will and Lina.  

November 2021

Despite Unk’s best intentions, the Astroblog was not back till November. Yet another round of health problems ensured that (this Getting Old bidness is hell). November was a rather important entry. Night-to-night, my most used telescope mount is my Celestron Advanced VX. If my old bones are weary and hurting, I can still get myself to set it up in the back 40. As above, however, the mount had been drenched in an unlooked-for storm, and I needed to give it a full checkout outside under the stars. If the mount was a goner, I’d have to replace it with a similar-sized one, and I sure didn’t want to be faced with “decisions-decisions.”

Thank goodness, the AVX was just fine. Heck, even the RTC battery was still good. I plugged in the HC, fired the mount up with my 5-inch APO, Hermione, onboard, and had quite the time eyeballing the late summer to early winter showpieces. What would I have replaced the mount with had she been kaput? That would have been the big question. Another AVX? An iOptron? Something higher-toned? Thinking about that makes my head hurt, so I sure am glad I don’t have to think about it.

December 2021

December is always my Christmas Eve message, which is usually shorter and more sentimental than other articles. Anyhoo…with the thermometer in the mid-70s, December 24th in the ‘Swamp didn’t exactly have a Christmas feel about it. Despite that, Unk was looking forward to one of his yearly astronomy rituals, my Christmas Eve look at M42.

How did I do that this year? For a while, it looked like the answer would be “not at all.” Clouds were everywhere. By mid-evening, however, they cleared somewhat, and Unk took a look with another MCT that hasn’t got much use in many a weary year, my little Orange Tube C90. The denouement was M42 looked wonderful it the small (but high contrast) view of the 90, and that, along with a bottle of a certain potation, put your old Uncle in a rather jolly holiday mood.

So, that was the year that was, muchachos. This year? As above, a fun observing project is in the offing. What’s it about? I will give you a hint:  It concerns one of Unk’s books. See y’all soon where all shall be revealed!



Friday, December 24, 2021

 

Issue 578: A Possum Swamp Christmas Eve 2022 ...

 

All I can say is “Merry Christmas, muchachos.” I know I’ve been remiss about getting new blog issues to you over the last couple of years. That did improve some this year, though, and I will see to it that continues into the new year. I am planning a series, in fact, on the Losmandy GM811 mount, which, despite it having been out for several years now, many are still curious about.   And, no, I haven't forgotten The New Herschel Project, my quest to observe the Herschel 400 from my modest backyard. 

But that’s next year. How about this year? How about now? Even in the sparse years, 2019 – 2020, for the little old blog from Possum Swamp, I have always managed to get the Christmas Eve edition out. And so it is this Christmas Eve in the strange and alien Year of our Lord 2021.

What exactly is going on at the New Manse here on the borders of the Great Possum Swamp this Yuletide? As you can imagine, it is a quiet Christmas Eve. Until the plague well and truly takes its last bow, no festive Christmas Eves like those of yore drinking Margaritas and eating fajitas at El Giro’s Mexican restaurant—though there is still an El Giro’s, which is barely two miles from Unk’s suburban digs. That will wait for next year (I hope).

What’s it like on this numinous day? Well, it don’t feel very Christmassy. Now, I don’t expect a white Christmas in the Swamp, but I do expect something with more of a Christmas feel than this. A glance at the weather station display in Unk’s radio shack shows it’s 73F outside and climbing. Whatev’. Unk will not let the cursed weather gods spoil his Christmas Eve.

You know what? In some ways, I’ve always preferred Christmas Eve to Christmas. There’s that wonderful sense of anticipation of wonders to come that maintains even in these latter days. And one of those wonders is one of your old Uncle’s astronomy traditions. To wit, my Christmas Eve viewing of that greatest of all ornaments, M42, The Great Orion Nebula.

So, what was up with that this Xmas Eve? In the days leading up to the glorious 24th, Unk had been purty derned sanguine, “Hell, why not get the GM811 and C8 out into the back 40 and get started on the articles about the mount?” But in addition to temps in the 70s and rising humidity, the weather had brought clouds. Not in overwhelming numbers at first, mind you, but they were flowing in from the southwest. So, the Losmandy, C8, and laptop might be a bit much. But which scope wouldn’t be a bit much?

My beautiful little C90, "Stella." I’d been thinking I needed to get her out of her case after the long, weary spell she’s spent in there. And she’s about perfect for a humid, hazy night where the light pollution is amplified and I only want to look at bright stuff anyhow. Under those conditions, her 90mm of aperture and f/11 focal length can surprise.

Miss Stella's optics still look good all these long years down the line.
What’s the C90 story? If you want to learn about how Unk’s C90, a classic orange tube model from ancient times, came to him, take a gander here. But the C90 in general? It’s been a perennial with Celestron, whether the original California company, the Swiss-owned mutation, or the current Chinese iteration. In fact, the C90 is still around and popular today, as a stroll through a very long-running thread on the Cloudy Nights BBS website will show. A small and portable but capable MCT like the 90 is always useful. But there are C90s and then there are C90s.

Many have been the permutations of Celestron's little (Gregory) Maksutov Cassegrain. In addition to the orange tube, there’ve been black-tube models, chrome-plated ones, rubber armored scopes, and the current dirt-cheap (f/14) Synta version. It’s been a spotting scope, it’s been on fork mounts, it’s been sold with GEMs. And most have been good little telescopes. The optics, including those of the current bargain-basement model, have always been good—though you often hear the opposite about the original orange-tube models.

There is a reason for that, campers, and it has nothing to do with the telescope’s actual optical quality, but with its focusing method. You see, the earlier C90s don’t focus by moving the mirror forward and back like SCTs or the current Chinese C90. They focus by moving the corrector and secondary forward and back. You twist the front part of the OTA to focus, not unlike a camera lens.

That works well, but you have to learn to exercise a light touch, or you get terrible shakes. Especially since the temptation is usually to under-mount this small but long focal-length scope. Those “bad optics” are usually due to owners not being able to attain sharp focus due to the shakes. Mount the girl on a sufficient mount and you will see how sharp C90s can be. My own orange tube is dead sharp with excellent optics.

Overkill? Not at Chaos Manor South it wasn't!
While most C90s have had similarly impressive optics over the years, my heart still belongs to the orange C90 She’s just so fricking pretty. And there’s that luxurious custom-made case. And the beautiful retro-style aperture cover. And amazing build-quality in general. Not that it's all gravy, alas.

The original telescope used the old Japanese Standard .965” eyepieces. Since you won’t want to mess with those if you, like me, acquire one of the original C90s, you have to rectify that one of two ways:  With an adapter called an “LAR,” a Large Adapter Ring, or with a hybrid .965” – 1.25” diagonal. I have an LAR and can even use 2-inch diagonals with the li’l C90, but most of the time there’s no reason to do that. My (Scopestuff.com) hybrid diagonal is just fine.

So, I grabbed the C90 case out of the sunroom closet where the astrostuff (sorry Rex) lives. And also, my SkyWatcher AZ-4 altazimuth mount, which is perfect for the little gal. However, to mount my spotter-heritage C90, which sports only a ¼-20 tripod block, on the AZ-4 I’d need a Vixen dovetail on the scope. I have one from Orion that has an integral 1.25-inch bolt for easy mounting to the OTA. But nowhere could it be found. I know I have it still—I saw it not long ago—but where?

While, as my loyal readers know, I’ve divested myself of a lot of unused astrostuff over the last six years, I still have a lot. Including a heavy-duty William Optics Vixen dovetail with a captive 1/4 20tpi bolt. Way overkill for a C90, but it would work fine. Slapped that on the girl, mounted her on the AZ-4, and out to the backyard Stella went to wait for darkness and for Orion, who, according to Stellarium, would be high enough for a look by 8:00pm.

There was no denying that by 2pm the scent of skunk was in the air. Clouds weren’t just flowing in; they were pouring in with the sky almost totally overcast. I didn’t stress out. It wouldn’t be the first time I’d been cheated out of my M42 on Christmas Eve. But the Clear Sky Charts was still predicting mostly clear.  Anyhow, if there weren’t even sucker holes by your old Uncle’s (increasingly early) bedtime, I’d just bring Miss Stella back inside, the work of maybe 5-minutes, one of the prime attractions of the little critter.

So, Unk settled in with a bottle of sarsaparilla to watch television with the cats and see what would happen. I peeped out at the sky every once in a while. By 6pm, it was looking a small amount better, and I actually got a look at Jupiter in a sucker hole. Naturally, the seeing was dreadful, but Stella had no trouble showing the equatorial banding on the disk and four Galilean moons nicely spread out on each side of Jove. Then the clouds came again, and back inside I went. 

Finally, it was 20 hours local. The sky had opened up a largish sucker hole in the Orion area and it was time. Best look I have ever had at M42? No, of course not--the drifting gangs of clouds saw to that. But it was there. My little telescope was showing the wonder to me, just as my Palomar Junior had showed it to me many, many long Christmas Eves ago. The clouds came, and the clouds went, and it was enough. 

What more is to be said? Have a wonderful Christmas everybody. These are tough times, but steady as she goes. I'll be back here again, soon. I promise!

Nota Bene:  Want some Christmas Eve Cheer in the old Chaos Manor South Tradition? This here is one of my favorites.

Nota Bene 2:  I appreciate all your kind comments. Unfortunately, the university email system pretty much prevents me from replying to them. Feel free to email Unk direct, however.   

 


Saturday, November 27, 2021

 

Issue 577: Unks’s Advanced VX Rides Again

 

Yeah, I know, no blog entries for September and October and we’ve barely squeaked in for November. I hate to disappoint my readers, but there just wasn’t no way, muchachos.  The weather was nasty all through September and into October. On those infrequent occasions when the clouds parted, there was a big, fat Moon in the sky. 

Your broken-down old Uncle had also been experiencing some health issues that made him reluctant to hit the backyard. You know, this “getting old” stuff is for the birds. Finally, just as clear weather came and Unk began to feel more like his old self, a third shot of Moderna had him laid pretty low for a couple of days.

Thankfully, all that is now past, and I am indeed close to being my old self again for good or ill. In fact, this past week I felt Good Enough to tackle my number one astronomy priority, checking out my faithful Celestron Advanced VX GEM mount. If you’re a faithful reader of the Little Old Blog from Possum Swamp, you know my AVX took a bath some months ago. I’d left the mount outside under a Telegizmos cover. Said cover was beginning to show some wear five years down the line, but it had not had a huge amount of use, and I thought it would be OK.

That’s what I get for thinking. I noted some gathering clouds as I covered scope and mount following my backyard observing run, but it didn’t look like seriously bad weather was on the way. Unk was soon snoozing peacefully and was not fully awakened by the sound of heavy rain and thunder. Oh, I came somewhat to my senses, but thought, “The scope will be fine under that cover,” turned over, and went back to sleep. The next morning, I found that dadgummed Telegizmos cover had leaked and mount and scope were truly drenched.

What to do? I first addressed the C8, Emma Peel, my Edge 800 SCT who’d been riding on the mount. There was a little water in the tube. But as you know, your ol’ Unk is nothing if not experienced in pulling SCT correctors. In just a few, the scope was dry and snug again in her case. The mount? That was a different story. It looked wet enough that I thought there was likely some water intrusion. Removing the plastic cover of her electronics enclosure, I did note some dampness. Rut-roh Raggy…it doesn’t take much to cause problems.

What I did was dry the boards off with gentle heat from my heat gun, and leave the mount head open in the air-conditioned sunroom of the New Manse. For several days. I then had another look. Didn’t notice any signs of corrosion, soo….  I applied power and the AVX appeared to function normally for an indoor “fake” alignment. However, nothing would tell the tale like a long evening under the stars. And there things rested for a wearyingly long time.

Finally, just the other day, the Clear Sky Charts and other weather resources indicated I might get some clear—if cold—weather following a front passage. Maybe one night. I was determined to take advantage of that, and despite some high haze I got the mount into the good old backyard.  In the interest of keeping things simple, I left the StarSense camera and hand control in their box and just plugged in the good, old NexStar+ HC. It had been so long since I’d done a non-StarSense alignment, I wondered if I’d still remember how to do one.

Which telescope went on the mount? My SkyWatcher 120mm APO. It had been way too long since I’d used this pretty telescope and was anxious to point her—Hermione Granger is her name—at Jupiter before it was too late. It was pretty clear seeing wouldn’t be too hot, not hardly, but I wanted a look at Jupe anyhow.

As darkness fell at a blessedly early hour—if Unk stays up till 2200 local time these days, that is a late night—a look to the west showed for the first time in some years I was going to miss one of my rituals, “My Yearly M13.” I wasn’t surprised. I’d checked Stellarium the previous morning and it showed M13 would be really low as astronomical twilight came in. That was sorta OK. To tell the truth, though I was feeling better, I still didn’t feel up to messing with cameras and laptops and guide cameras and etc., etc., etc. 

OK, power on…the NexStar display came to life with only a slight delay despite the cold weather (it was in the fricking 40s, y’all). I was gratified to see the mount's real time clock was only off a few minutes despite it having been months and months since I replaced the little internal battery and not having used the AVX frequently. Not at all. Hokay, let’s get aligned.

By “aligned,” I mean the Autostar 2+4 alignment. I planned on nothing more than some casual looking, and, so, my polar alignment consisted of merely eyeballing Polaris through the mount’s hollow polar bore. One of the great things about the Celestron NexStar goto system is that it is quite immune to goto errors caused by polar alignment.

It turned out I did remember how to do an old-fashioned alignment.  Got it started and the HC requested Vega, which was pretty far off center, but still in the finder. Centered it up in the eyepiece, remembering—shazam! —to do final centering with the up and right keys only. Altair next. That sparkler lined up, the NexStar+ axed if I wanted to add calibration stars “Sure, why not?” The first, Fomalhaut, was behind a tree, so I picked another. Calibration star three was near-centered in the eyepiece of the main scope when the mount stopped, but I did one more anyway…well…just because I could.

The resulting alignment? It was a good one. For a while, anyway. Anything I requested was in the center of a 12mm eyepiece. Heck our first target, Jupiter was centered in a 7mm when the slew stopped. And that’s the way it was until I decided to fetch my observing chair, and in the course of placing it at the scope bumped the tripod, but good. Henceforth, objects were toward the edge of the 12mm, but always in view. And…that’s just the way it goes on an Uncle Rod observing run, as you surely know if you’ve been reading here long.

How was Jupiter? The wind had laid down at least, but, no, the seeing was not very good. He was reasonably sharp and showing off multiple belts, but conditions were reducing the contrast of those belts. The Galilean Moons were dancing around most of the time. Not a bad image in the 7mm UWAN (William Optics) wide field, but nothing to get excited about. What was exciting? Just being able to get out and run an eye across the King, no matter how he looked.

Next up? If I couldn’t take a picture of the Great Globular, maybe I could get a parting glimpse of him as he plunged into the west. By this time, M13 was maybe 15-degrees above the horizon. Alas, when the slew stopped and I inserted the 13mm Ethos I saw exactly nuttin-honey.

I wasn’t about to give up. I suspected the problem was the focus difference between the 13 and 7mm eyepieces. I should have focused the 13mm before I left Jupiter. Down here in the horizon muck, no bloated stars were visible in the field to use for focusing. So, off I went to Vega to focus. There I sharpened things up. Did I note the utter lack of false color displayed by the SkyWatcher APO? Nope. After this long, I just take it for granted. Vega was a pure, icy blue sapphire.

Back to M13. I spotted the cluster the moment the slew stopped. Not bad, really. Dim, sure, but grainy and wanting to show a little resolution. Would more magnification have helped resolve more stars? Perhaps, but the cluster was dim as it was. Pouring on more aperture would have helped, but I wasn’t about to lug out the 10-inch Dobsonian, Zelda. The SCT? My observation is there’s not a huge difference in visual images presented by the 8-inch SCT and 5-inch APO, not enough to justify me changing OTAs, anyhow.

What next? How about M57? OK. To Lyra we went. The Ring was just that, a perfect little donut displaying plenty of contrast. Since the constellation was riding high, I thought we might essay the somewhat dim globular cluster M56. It was actually pretty good, looking much like the horizon-bound M13. My observation over the years has been it takes about 10-inches of aperture to make this somewhat neglected glob look good. And 12-inches is better. My long-gone old friend, my 12-inch Dobsonian Old Betsy, could make this seemingly nondescript object into a freaking showpiece.

The next target, M76, the Little Dumbbell is thought by some to be “difficult.” Not so. I once viewed this little sprite with my old 60mm ETX from deep in the light polluted suburbs, at my old observing site at the public schools’ Environmental Studies Center. The secret is an OIII filter. But it has to be the right OIII filter. I walked into the sunroom and fished a little box labeled "OIII" out of my accessory box. Onto the 12mm it went--with some difficulty. I was nonplussed that for some reason it didn’t want to thread onto the eyepiece properly. With the filter finally in place, still no M76 did I see. What the—?

My red flashlight revealed the problem. On the edge of the filter-holder was inscribed “Lumicon.” When I bought this one in 1995, I thought it was the bee’s knees. But either it has somehow degraded over the years (possible, I guess), or I just know more about filters 25 plus years down the road. At any rate, this old thing (one of the pink-hued Lumicons) doesn’t work very well, and the filter threads on it were never quite right. In I went and retrieved my Celestron (Baader) 1.25-inch OIII. Ahhh…there it was. Not only was the mini-Dumbbell visible, it even showed off its twin-lobed shape.

After that? Hermione and I hopped around the sky, me occasionally looking at SkySafari on the iPhone for inspiration. In no particular order…

M103. This oft-overlooked small (6’) but brilliant galactic cluster was just beautiful.

M31 and company. M31 looked maybe a bit better than it usually does from the suburbs. M32 was a brilliant little thing, naturally. M110 was something of a surprise. It was easily visible despite sometimes being a trial from compromised skies.

M27, the (big) Dumbbell was attractive, especially with the OIII. Unfortunately, haze was developing in Cygnus area, and I had a hard time seeing nearby M71, the loose little globular star cluster once thought not to be a glob.

NGC 457, The E.T. Cluster. Does this little guy ever look bad? Well I remember showing him off to Miss Dorothy from the urban backyard of old Chaos Manor South. He looked good there, and he looked great here, a little stick figure awash in a sea of stars.

M15, The Horse's Nose Globular. Haze was creeping into the Pegasus area now, so I didn't expect much from this little glob. Surprise! In addition to M15's preternaturally bright core, quite a few teeny-tiny stars were on display at the edges of this wonder.

And on we went. Me and Hermione wandering the late autumn stars, going wherever our fancy took us. You know I strongly endorse having a detailed observing list. Which I didn’t have on this night—I was just going to do a quick check of the mount on an object or two, I thought. I probably would have seen more if I’d made one up or had dragged out a laptop running Deep Sky Planner. But you know what? For once, just tramping aimlessly across the sky was kinda fun…kinda freeing, actually.

Alas, before long, old Unk had reached his infamous “I have had enough” stage. Those of you who know me or who’ve been aboard this blog for long know that happens once my feet get cold. When they do it is time to throw the big switch and cover the scope. Which I did. Said cover being a new one, which I hope proves to be better than the lastun.

As for the mount, the Advanced VX, I was satisfied all is well with it. Not a single hiccup from power up to power down. Which is a very good thing. I need a mount in this weight/payload class, and with anything that comes from China—as the AVX and her cousins do—being nigh impossible to get these days, I certainly wouldn’t want to go mount-shopping right now.

Alrighty then. See y’all next time. Which will surely be by Christmas Eve for our traditional blog post. But I do hope “sooner.”

 


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