Sunday, November 24, 2013
Destination Moon Night 3: 37 down, 263 to Go
Actually, I
could have called this installment “The Little Camera that Could” in honor of
the star of my Saturday night show, the ZWO ASI120MC, one of the new astro cameras out of China that are taking the
planetary imaging world by storm. The inexpensive ZWOs with their small chips
and many small pixels are perfect for high-resolution imaging of the Sun, Moon,
and planets, but that’s not all they can do, muchachos.
I haven’t
tried the camera on the deep sky (yet), but I have been amazed at what folks have
accomplished there despite the ZWOs’ little chips and lack of cooling (I
understand a cooled ZWO is planned). No, you can’t capture huge swathes of
space, but the little cams have produced surprisingly good pictures of
planetary nebulae, galaxies, and globular clusters.
I hadn't
used the ASI for anything but the Moon until recently, when I did a few
shots of the Sol with my friend Jonathan’s Coronado solar scope at the just
finished Deep South Regional Star Gaze. I’d heard rumors that the ZWO cameras didn't
work well with a hydrogen alpha scope, but considering the images I got with my
color camera on my first attempt with Hα, I gotta rule that talk bull-spit
(this is a family friendly blog, y’all).
As they say
on the pea-picking TBS late at night, though, “THAT’S NOT ALL!” I’ve also
used the ASI120MC for spectroscopy. With the aid of the program RSpec,
which I’ve been testing, and a Star
Anlyser grating, I was able to easily—yes, easily—capture a detailed spectrum of Vega. Unfortunately, that was
my first outing with the spectroscopy set up, and I didn't have things set up quite
right. A quick consultation with RSpec’s
helpful (and talented) author, Tom Field, edumacated ol’ Unk as to where he’d
fouled up. So, I was anxious to give Vega another try, and last Saturday night
seemed like a good time to do it.
There’d be a
near First Quarter Moon in the sky, not a very good time to go after galaxies,
but Luna wouldn’t prevent me from taking Vega’s spectrum. And I could combine
that with shooting some more images for my Destination Moon project. I’d barely scratched the surface of the 300 lunar features I’ve set as my imaging goal for the DM project, and needed to get back after it.
Sol in Ha from DSRSG 2013... |
I was still
a wee bit weary from the exertions involved in packing for, attending,
observing at, and returning from a major star party the previous week, y’all.
But so what? I’m retired now, and I got to thinking I ought to be doing a lot
more observing than I am. The big old oak trees that surround and envelop Chaos
Manor South don’t allow me to do much from home, but the Possum Swamp
Astronomical Society dark site is only 45-minutes away, and I now have the one
thing I lacked for the previous three decades: time.
That’s just
what I’d do on this weekend, I thought:
spend the early evening at the dark site imaging my silv’ry girl, Diana, and when she
began to sink I’d switch over to spectroscopy and get Vega and maybe a few
more stars besides. I’d be able to use the ZWO for both purposes, wouldn’t need
too much gear, and I’d be able to make it a reasonably early evening now that
that fricking-fraking Daylight Savings Time is done.
Saturday started
out with a beautifully blue sky, but the weather-saps insisted clouds were on
their way, and I had the feeling they were correct for once. The formerly cool
(for us) temperatures were spiking back up into the 80s, and the humidity was
rising. As the day wore on, the skies remained mostly clear, but there was a
line of stuff low on the western horizon, never a good sign, and I began to
wonder whether I would be able to beat the advancing front.
At four
o’clock it wasn’t raining, at least, and I stuck to my maxim, “If it ain’t
raining, head to the dark site.” At least I didn’t have too much to pack, not
compared to a Mallincam run: Mrs. Peel
the Edge 800 SCT, the VX mount, the tackle box that holds most of my accessories,
and one large Tupperware container with the rest of the astro-junk. The imaging
gear consisted of the ZWO and accessories in an aluminum tool attaché case I
got from the cotton-picking Harbor Freight, and my Toshiba Satellite laptop. With sundown coming
at quarter after five, I hit the road at 4:30.
Pretty, but not so encouraging... |
The farther
west I went, the higher those damned old clouds climbed. By the time I was out
of the city, there was a substantial bank of thick gray suckers in the southwest.
Y’all will be proud of me that I didn't even consider turning Miss Van Pelt
around. I continued on to the PSAS field and got to work setting up—in a right
big hurry.
Looking at
the reddening western sky, which seemed to give the lie to “red sky at night,
sailor’s delight,” I estimated I might have an hour at best, so there was no
time to lose. Old Unk scurried, campers, scurried.
I originally planned to do a good rough—through the hollow polar bore of the VX—alignment
on Polaris, which would be followed by a full six star go-to alignment and an
AllStar polar align. But Polaris was not visible yet, and when it got dark
enough to see the North Star, I was purty sure it would be behind the clouds.
Since I couldn't see Polaris, I used my compass to get the mount’s azimuth as close to that of the
North Celestial Pole as I could. We are lucky down here that magnetic
declination (deviation) is small, so a compass can get you close. The mount’s
R.A. axis elevation was still set for the Feliciana Retreat Center, and I left
it alone, since FRC is just a smidge north of the PSAS dark site in latitude.
That was the
extent of my polar alignment. Now came mount go-to alignment. I’d left the NexRemote cables, game pad, and game pad
receiver at home, since I knew I wouldn’t want to devote time to setting all
that up with weather on the way. Y’all know I ain’t a fan of the Celestron Plus
hand control that came with the VX mount, but all I’d be doing with it would be
a simple Solar System Align and aiming at targets with the direction
buttons.
Lit off the
mount, entered time and date and such, and selected Solar System Align from
the menu. Chose “Moon,” and the mount and Mrs. Peel slewed that-a-way. I was
surprised they stopped as close to Luna as they did—maybe a half degree away. I
suppose the fact that I’d used exact time off’n my iPhone helped a little. If
the sky cleared or the clouds stopped in their tracks and I had the chance to
do some spectroscopy, I’d bite the bullet and do a 2 + 4 go-to alignment and an
AllStar polar alignment before I got started with that. From the way the evil dark
things were flooding the sky from the west, I didn’t reckon I’d have to worry
about that, howsomeever.
Mrs. Emma Peel and VX... |
The clouds apparently kept my fellow PSASers at home. I was alone, and while I have been
known to get spooked at this slightly lonely airstrip, I was perfectly
comfortable all by myself on this night. I was way too busy to worry about
the depredations of the dadgum Skunk Ape and his despicable pals, Mothman and
the Little Grey Dudes from Zeta Reticuli 2. I will admit I left the runway
lights on, but why not? I was imaging the Moon and wouldn’t need a bit of
dark adaptation.
With scope
more or less aligned, it was time to get the rear cell setup done. When I am
imaging the Moon and planets at high magnification, I always use a flip mirror.
My first experiments with video back in the early 90s, which involved an
ancient Sony camera with a vidicon tube, revealed that even with a precisely
aligned finder it’s near impossible to get even the Moon on a small video
camera chip without major exertions.
Flip mirror
on Mrs. Peel’s (ahem) rear, and 12mm reticle eyepiece in the flip mirror
focuser, it was time to set up the cam. We used to use eyepiece projection to
get long focal lengths for Lunar and planetary work, but that has gone the way
of the dodo. Barlow projection provides much better images, and with today’s
small chip planetary cams, you don’t need the huge focal lengths provided by
eyepiece projection.
How much
focal length would I need? I like to
shoot the Moon at about f/30, but what I’d seen through the eyepiece in the
course of getting the mount aligned showed that would be too much on a night
where the seeing started out bad and would undoubtedly get worse. A 2x Shorty
Barlow (Orion) went in the flip mirror’s 1.25-inch rear port rather than my 3x
APO Owl Astronomy Barlow, and the ASI120MC went into the Barlow via its
1.25-inch nosepiece.
One other
thing you will need in addition to a flip mirror and a Barlow for Lunar imaging
with the color ZWO is an IR block filter. Imaging
chips are very sensitive at the infrared end of the spectrum, so you’ll usually
want to block most of that. If you don’t, your pictures will have a strong
red/pink cast that it difficult to correct during processing. If you buy a color
ZWO camera, you’ll find the maker has thoughtfully included a 1.25-inch IR
filter that screws onto the camera’s nosepiece.
You need a
software program to run the camera and handle image capture, of course, just
like with any other astronomical cam. When I first got the camera, I
started out with the freeware program Sharpcap.
It works very well with the ZWO, and is simple and effective. I’d still be
using it today if I hadn’t discovered another freeware soft, Firecapture.
Maurolycus |
Firecapture has nothing to do with the old Firewire
data format; it is a program designed to control astronomical cameras,
especially for Solar System imaging, and, frankly, campers, does more than I
will ever call upon it to do. Not only will it control filter wheels and
motorized focusers as well as cameras (a large selection of cameras), it will
even calculate ephemerides of Solar System objects. Best of all, it is easy to
use. Only caveat? If you want to use Firecapture
with a ZWO camera, make sure you download and install the v2.3 beta. Earlier releases
tended to lock up with the ZWO cams.
Camera and
software ready, I went back to the eyepiece, centered a target feature on the
6-day old Moon, the complex and interesting crater Maurolycus, flipped the flip
mirror up to send light to the camera, went back to the Toshiba, and saw...absolutely nuttin’. Oh, for god’s sake. What
now? I didn't need this with weather coming in. I managed to keep my cool somehow, and it
turned out all I had to do to get the crater in view was tweak exposure and gain, which were still
set for imaging through the solar scope.
The
live image, the video (like other planetary cams, the ZWOs output a .avi video
stream), of Maurolycus looked OK, especially after I fine-tuned focus, but just OK. The seeing was even worse than it had been
when I’d aligned the scope, but it’s amazing what Registax 6 can do, so I fired off several 25-second sequences
anyhow. That yielded around 800 individual
frames even at max resolution, 1280 x 960, and that is usually more than enough
frames for a high resolution lunar image.
Maurolycus has always been one of my go-to lunar
features. It’s big, 114 km in diameter, and, while it is located smack in the
Moon’s southern highlands, it is far enough from the limb to look round. Though
it was formed purty far back, during the Nectarian period about 3.9-billion
years ago, it has a fresh, deep look. At this point in the lunation, the nearby
large crater Barocius, which can look soft when the Sun is higher, also stood
out well.
This was hardly the first time I’d imaged Maurolycus; I took quite a few shots of it with
my old SAC 7B modified webcam. This crater always looks good; surrounded by
large amounts of detail, it gives your images a “high resolution” look, even if
they are actually a little soft.
Theophilus |
Next up was
one of the most photogenic features on the Moon, the crater trio of Theophilus, Cyrillus, and Catharina.
I chose to concentrate on Theophillus, cutting off part of Catharina. While all three
look good together, Cyrillus and Catharina look old and fuzzy. Theophilus is
sharp and just loaded with detail including an exquisite central peak complex.
This big 101 km diameter crater is likely fairly young, probably dating from the
Eratosthenian period about 1 – 3-billion years ago. When the seeing is better
than it was on this evening, it’s easy to capture lots of small detail including
rilles and countless craterlets.
Agrippa and Godin, a pair of craters not far
from the shores of Mare Vaporum, are usually fairly uninteresting. Both appear
round and deep with Agrippa being 46 km across and Godin about half that size at
21 km. While their floors are fairly detailed when visible, neither is really much to
write home about. The real scenic landmark to visit here is the wide rille just to the north
of the craters, Rima Ariadaeus, a
graben, an area where the ground has slumped, which runs east/west for some
220km. This whole area
is a welter of rilles, small craters, and ghost craters. I thought even
normally staid Agrippa and Godin looked very photogenic on this night with
their floors still covered in inky black shadow.
Delambre, a medium sized 53 km crater sitting
near the edge of Mare Tranquilitatus, is not one I remembered, though I’m sure
I must have observed it numerous times over the years. This is a nice region,
with a crowd of craters large and small, and certainly deserves a look. The
main interest at Delambre is its rough looking floor, which I suspect on a good
night would give up some craterlets, and the crater’s beautiful terraced walls.
With
conditions worsening by the minute, I wasn’t sure whether or not I’d get an
acceptable image of Plinius. I did, but just barely, and may revisit this
Eratosthenian crater on a better night. It deserves it. This fresh appearing
43 km formation stands out since it is offshore out in Mare
Tranquilitatus near a cape, Promintorium Archerusia. Of particular interest
are the crater’s detail laden floor and a complicated-looking central peak.
Agrippa and Godin |
When I had Plinius in the
can, a look up showed Luna was soon to be bathed in clouds, and was already
covered by a thin layer of haze. Actually, it seemed as if Diana might skirt
the cloud-bank for a while, but the haze and the seeing near it were so
bad, and the last exposure of Plinius so soft, that it was obviously time to
pull the Big Switch. It didn’t look like rain was imminent, but it
didn't look out of the question, either, so I didn't tarry.
From the
time I’d mashed Firecapture’s record
button on Maurolycus, I’d had little more than half an hour of imaging, so I
was back at good, old Chaos Manor South and sitting in the den with a big
libation of the pea-picking Rebel Yell at 9 in the freaking p.m. Just in
time for my fave Saturday night show, Svengoolie. Unfortunately, the film he was
showing was Ghost of Frankenstein, my
least favorite among the Universal monster movies. Frankenstein’s Monster on
the witness stand in a brightly lit courtroom? Reeeeee-diculous, y’all.
Svengoolie
purty much a bust, and it still early, I couldn’t resist sitting down to the Toshiba
Satellite and test-processing one of the sequences of Maurolycus with Registax 6. If you’ve used the previous
versions of the premier image stacking program for planetary observers, the new
one, 6, won’t hold too many surprises. Some new options have been added,
especially to the wavelets screen, but nothing that should bring you up real
short. If you are new to Registax?
This tutorial by Paul Maxson does the best
job I’ve seen of getting you started simply and quickly.
If you are new to Firecapture
and are using a color camera like the ASI120MC, there is one thing to
get used to. You need to debayer your
sequences before you process them with Registax; you have to convert the camera’s
raw video to RGB color. You can allow Firecapture
to do that on the fly as you image, but that causes a fair amount of processing
overhead and usually results in lower frame rates. Firecapture comes with a little app that will allow you to debayer
sequences in batches or singly after the fact, and that is what I do. I also often convert my final images to black and white. I just prefer monochrome for the Moon.
Delambre |
After I’ve
stacked in Registax and sharpened the resulting still image with its amazing
wavelet filters, I normally do a little fine-tuning. Registax has its own image processing tools, but I find it easier
to use Adobe Photoshop or,
increasingly, Adobe Lightroom. I
began using Lightroom to process and organize the terrestrial images I shoot
for my books and magazine articles, and find nearly as powerful as
Photoshop and much better than Photoshop’s “Browse” function at keeping my
hundreds and hundreds of pictures organized.
Lightroom is much less expensive than Photoshop, a measly 149 bucks for the downloadable
version vice 650 smackers for Photoshop. For most imagers, Adobe Lightroom is more than capable enough, and for working photographers it actually has some advantages over Big Bro.
So what did I think of my latest batch of Moon pictures when I'd Registaxed 'em all the next day? As you can see above, not
bad, not bad at all—considering the conditions. If nuttin’ else, muchachos, it
showed, once again, that you will always get more out on the observing field
than you will sitting in front of the dadburned boobtube.
Next Time: New Kid on the Software Block...
Sunday, November 17, 2013
Through a Glass Not so Darkly
Okay, where was we, muchachos? I’d just finished the third
night of the 2013 Deep South Regional Star Gaze, which was the first clear night after a couple of days of
stormy weather. Friday night was damp, y’all, real damp, but I got a lot
accomplished. In about five hours, I did 77 Arp galaxies and 20 showpiece objects
besides. When I finally drifted off in our room in the Lodge at 3:30 in the
a.m., I was feeling good.
I felt even better when I awoke after nine Saturday
to skies that were, if anything, clearer and bluer than they had been Friday. The
air was also a whole lot drier. It was slightly breezy and it felt as if the
humidity had dropped by double digits. A quick run down the field before
breakfast was illuminating, campers. If I hadn’t known otherwise, I’d a-thought
it had rained; everything—scopes, canopies, tables—was wet. Friday night’s
ground fog, the remnants of it anyhow, was still hanging on but was soon burning off and I
didn't think it would put in a return appearance Saturday evening.
After breakfast, where the Feliciana Retreat Center staff
kicked it up yet another notch,
adding pancakes to the grits, bacon, sausage, eggs, and biscuits, I had a
couple of things to consider. First was what to do with myself all the livelong
day. Second was what to do with the night that was coming. The former turned
out not to be much of a problem. Once I was done with breakfast and had lingered
over a few cups of Joe, it was near-about noontime.
The second question was a bit more difficult to answer. I’d
covered most of the Arp galaxies that would be well placed before the wee, wee
hours, so I didn't believe I’d be able to devote a second night to Operation
Arp. Originally, the plan had been to do some further testing of the remarkable
Mallincam Junior Pro. I’d image some of the
same objects I’d got with the Xtreme, at least the showpieces, and see how
Junior stacked up against big sis. That was before Miss Dorothy won her
telescope, though.
As I told y’all last week, Miss D. won a lovely new scope,
an Explore Scientific AR102 refractor, at the Friday afternoon raffle. It sure
looked good, but I had a powerful hankering to see how good it would be to look
through, not just at. I mean, y’all, do you really
think I’d let a brand new scope sit idle on a clear night? Junior would get his
turn under dark skies down in Chiefland after Christmas if not before. Tonight
we would go visual—with a freaking refractor.
It was still damp Saturday a.m... |
As you probably know, Uncle Rod just ain’t a refractor kinda guy. Oh,
I’ve got a couple of ‘em. Small ones. 80mm is the largest aperture lens-scope
in my stable. And those little guys get used infrequently at best. As I have
said before, Unk’s refractor-phobia had its origin in my first look through
what was supposed to be the wonderscope of all wonderscopes, a Unitron.
If you came of age as an amateur astronomer in the 60s or
70s, I don’t have to tell you what a Unitron was, but for you sprouts, Unitrons
were gorgeous long-tubed achromatic refractors that graced the advertising pages
of Sky and Telescope every single month.
When the company’s Christmas ad appeared in the December 1965 issue of Sky and
‘Scope, Unk, like a thousand other space-crazy Boomer kids, couldn’t help but
put a Unitron on his Christmas list.
Not that I had a dog’s chance in hell of getting one. The
basic Unitron, a 2.4-inch (60mm) alt-az job, went for one-hundred and
twenty-five fraking dollars in the mid-60s. Which was somewhat more than the average for a week’s wages back then. At least I could dream.
Unitrons were the very stuff of
dreams, and I spent plenty of lazy afternoons dreaming about what I would be
able to see through Unitron’s 3-inch Photo-equatorial, which was the one I
really wanted. It was a Unitron, so I
naturally assumed it—or even the 2.4-inch—would show far more than my 4-inch
Palomar Junior Newtonian or even my “realistic” dream scope, a Criterion RV-6
Dynascope.
Seemed like back then every neighborhood had a Little Rich Kid
in residence. We did, and he was not a bad feller, but he and I had had a bad
falling out and didn't speak much. Nevertheless, when he cajoled his old man into buying
him a Unitron Model 114 alt-azimuth 60mm, I wasn’t too proud to cadge a look
one night when I spied him setting up in his backyard.
Those thrilling days of yesteryear... |
What I saw was a yellow-orange Moon that was OK, but didn't
look near as sharp as it did in my Pal Junior at a similar magnification. When
Bubba applied his highest power eyepiece, the lunar surface didn't rush up to
meet me like I was making a descent with the Destination Moon rocketship, it mushed out. I somehow managed to force
out a “Great scope!” or two and headed home to my lowly Edmund as fast as my
legs would carry me.
My disappointment in the little Unitron stayed with me. Now,
before you refractor troops get all huffy, yes, I know a good refractor is capable of excellent performance. And a good apochromatic refractor capable of
astounding things. Hell, I’ll even grant that that 60mm Unitron probably could
have surprised under the right conditions in the right hands. And yet...and yet...my disappointment with that pretty little telescope stuck with me.
And now a refractor had come to stay with Unk and Miss
Dorothy. I had no idea what to expect. It was bigger than any refractor I’d
owned. Four fraking inches, same aperture John Mallas used to make the
observations for his classic 1960s columns and his book, The Messier Album. I loved and still love that book, and John M.
had obviously seen a lot with a 4-inch refractor, so I’d reserve judgment on
the one sitting in its box under our tailgating canopy until it was under the
stars.
First step was getting the newun on the mount. Shortly after
D. received it, I’d checked out the dovetail sitchy-ation and had determined
there’d be no problem mounting AR on VX. It came with a nice pair of rings and
a Vixen compatible dovetail, and would work out of the box with the VX—if I could balance it. I’d only brought along
one counterweight, one 11-pound counterweight. That’s enough to balance the C8,
but I wasn’t sure about the AR102. I had almost packed a second weight, but
hadn’t. Why? I had an epiphany the night before the star party: “Maybe I should
bring another weight, we are gonna win
that refractor. Naw, might jinx it.” Lucky guess or an instance of Unk’s POWERFUL REMOTE VIEWING SENSE? You be
the judge.
On the VX... |
I felt a little guilty about relegating the Edge 800 to her
case, since she had performed so brilliantly the night before, not just
capturing the Arps, but bringing back surprising detail in ‘em. But I figgered
she’d get over it. Unk had new scope fever, and the new baby’s looks were just
sending his temperature ever higher.
To start with, the tube was a gleaming white. I’ve loved
orange, black, and blue tubes over the years, but white just seems right for a scope. My Palomar Junior’s
tube is white, my RV-6’s tube is white, and now our current scopes, my Edge 800 and Dorothy’s AR102, have
white tubes; it’s like a return to those thrilling days of yesteryear. I might
add that the finish on the Explore Scientific is flawless and the Explore decal
on the dew shield is attractive and professional looking.
Ah, yes, the dewcap. That’s the one thing on the scope that
makes it stand out. It is considerably larger than the dew shields on similar aperture
refractors, and seems bigger than it needs to be, even given the scope’s somewhat
oversize objective cell. Once I had the dew controller adjusted correctly for
the night’s conditions, the larger diameter of the shield didn't seem to hurt
anything, though. As my buddy Jon said,
it just seems to make the scope even more impressive looking. What it actually looks
a lot like is the old LXD 75 – 55 refractors from Meade. That’s okay. I always liked
the cut of their jibs.
Perhaps the most impressive thing about this OTA is the
focuser, a hefty 2-speed Crayford in
a hefty tailpiece assembly with two large and hefty (that seems to be the operative
word for the AR) aluminum knobs. Looked good, but I couldn’t help being
skeptical. I’ve seen plenty of focusers on import scopes that looked good, but worked bad: rough, prone to slippage, impossible to adjust
correctly. Only use under the stars would tell which way this one would go. The
focuser uses a compression ring impinged on by three big screws, not just
setscrews, to hold the diagonal in place.
Accessories? They are surprisingly lavish. There’s a 50mm
finder with a gleaming white tube that sports nice dual crosshairs. The only down
check with it is its mount. Oh, it’s nicely done, I reckon, but like most of
those that ship with scopes these days, it uses the
two-screws-and-spring-loaded-tensioner paradigm. I prefer three adjustment
screws per ring, as that seems to hold alignment better. I guess this is the
current fashion with Chinese scope makers. The Edge 800’s finder bracket also has a
spring tensioner-thingie.
Also impressive is the star diagonal I found in the box.
It’s a 2-inch job, a nice HEFTY 2-inch job, marked “99% reflectivity.” It uses
a compression ring to hold the eyepiece and the sides are an attractive carbon
fiber material (that’s what they look like, anyhow).
The legendary FRC pot-roast... |
Finally, there is the tube rings/dovetail. Again, “hefty,”
with nice oversized knobs and a precision manufactured Vixen compatible
dovetail that slid into the saddle on the VX mount easily and was not too tight
nor too loose. Also cool is that the “top” side of the rings opposite the
dovetail is formed by a carrying handle that made it easy to get the OTA on the
mount.
The refractor was on the VX and looking oh-so-fine. Miss D.
was thrilled to receive many admiring compliments about her pretty, new scope, and she
and me could hardly wait for first light. Before that could happen, though, we
had to get through the tail end of the afternoon. I spent a little time reading (more military SF), but the biggest event was
the last raffle of the star party. Naturally, again, Unk didn’t win nuttin’, but my friend and observing
companion, Jon Ellard, almost unbelievably, won the second AR102. He was just
walking on air about that. Looked like it would be a dadgum refractor party on
the old DSRSG observing field Saturday night!
Not long after the raffle, it was time for supper. I believe
my favorite on the FRC menu is the pot-roast—the menu remains purty much the
same spring and fall year after year—but the brisket is a close second.
Tender…smoked to perfection…excellent sides…the salad bar…gallons of that
southern elixir, sweet tea. What more could a hungry hillbilly ask?
Then, darkness was upon us. D. and I bundled up, since it was
to be considerably colder than it had been the previous evening. Friday, it got
down to maybe the upper forties—though the humidity made it feel colder than
that—on this night it was forecast to hit the upper thirties. That’s verging on
“too cold” for this good old boy, especially since I’d be out under the stars
at the eyepiece of Dorothy’s refractor, not under the canopy next to a heater
in front of a computer and a video monitor.
Jon with new friend... |
Anyhoo, the mount set up was exactly the same as the night
before. I hadn't managed to move or bump the tripod, so I didn't have to worry
about polar alignment. Since I didn't say anything about it last week, I
suppose I should mention I controlled the mount with NexRemote, Celestron’s program that takes the place of the hand
control. While I’d be observing visually and not sitting at the PC, I like being
able to use a wireless Wingman game pad
as an HC thanks to NexRemote. One
less cable to get tangled up in. NR works just as well with the VX as it does
with my other Celestron mounts, albeit with one hiccup.
If your telescope mount features one of Celestron’s “PC”
ports, there is no need to worry about the hardware hand controller at all. It
can say in its case or at home. You plug the laptop directly into the PC port
via Celestron’s “programming cable.” While the CG5 doesn't have a PC Port, I can
provide one for it with it with their (no longer sold) Aux Port Accessory, which
plugs into the hand control socket.
Unfortunately, the Aux Port Accessory doesn't work with the VX. That means I have to connect NexRemote to the mount through the port on the base of the hardware
hand control. You don’t have to do
anything with the hardware HC; it just provides a way of connecting to the
mount. Wish I didn't have to fool with it, but it is not a big deal, I reck.
Soon as it was dark, I got the mount goto aligned. That was
no more difficult than it had been the previous night, or shouldn't have been.
I had forgotten how much I hate using a “real” finderscope for alignments. Mrs.
Peel has a Rigel Quickfinder on her, and my other most used C8, Celeste, has a
Telrad. The AR102’s finder is a pretty one and the optics are good, but I find
it much easier to use a zero-power job. That, combined with the fact that we
were real excited and that it was just barely dark enough to see alignment
stars, caused me to miss Fomalhaut when I was doing calibration stars, aligning
on a nearby sparkler by mistake. I got an “align successful” message nevertheless,
but the go-tos were not as good as they normally are.
The Happy Hand Grenade... |
Nevertheless, everything I requested was in the field of the
refractor using the 16-mm 100-degree Zhumell eyepiece, the Happy Hand Grenade. What was our first light target? M13, of course.
Yeah, it was probably a little low here in the first week of November, and it
really wasn’t dark enough, but with it in the sky, what else would we go-to
first?
My impression after Dorothy had had a good long first look
with her new scope? How tiny the
stars were. Yeah, I know, people always talk about stars being tiny in a
refractor, but most of the reason for that is that stars naturally look
“smaller” at the lower powers you get with a medium aperture/medium fast
refractor. The AR102 is a 4-inch f/6.5,
so the HHG was producing a measly 41X. Still, I gotta say them stars looked mighty little
and sharp. I was also extremely impressed at how many were resolved in the
cluster. M13’s core was grainy, and there were dozens of eensy-beansy sparklers
around the periphery when I exercised averted vision. Considerably more stars
than I see with my 4.5-inch StarBlast Newtonian.
How was the field edge? In the Happy Hand Grenade, stars
were acceptable. Not perfect, but okay, and not much worse than in my f/10 SCT.
In the Ethoses, they were very good indeed. There is field curvature with this
relatively fast achromat, but I never found it annoying. I didn’t notice any
other optical problems of any kind. Collimation appeared to be bang-on.
The view of M13 was nice, and was considerably better when
we switched to the 8mm Ethos (83X), but busting globs is not the strength of a 4-inch wide-field refractor. You go to one for, well, wide fields. While we
could, we headed south to the rapidly sinking wonders of Sagittarius and company. They were
all tremendous despite their low altitude. The Eagle Nebula in M16 showed up easily;
the Lagoon was its purty old self despite being way down in the southwest. The
real winner, though, was M17, the Swan Nebula. It looked great, especially with
the help of a Lumicon 2-inch UHC filter, in every eyepiece we tried, but for me
was best in the Happy Hand Grenade. The Swan was a little small in that ocular,
but not too small, and it was
swimming in a huge, crazy-rich sea of (yes) tiny stars.
We did plenty more showpieces in this early part of the evening,
including M22 before it sank out of sight. It’s loose and it’s big and if you
want a globular that’s well-resolved and just looks good in a smaller scope, that
is it. M20 was easy to see and showed its "petals," a pretty good accomplishment at
this time of year. M31? Freaking amazing with at least one dark lane evident. When we'd finished with the Andromeda Nebula, Miss D. was feeling chilled,
and both of us were still a little concerned about her “spell” the day before. After
a quick look at NGC 457, the E.T. Cluster, who waved her goodnight, she left
the field for the Lodge and left her beautiful new scope in Unk’s eager hands.
What would I look at? Now that I’d calmed down a
little—first light was done and I had assured myself that D’s scope didn't just
work, but worked Real Good—I thought a test might be in order. The AR102 is an
achromat, and like that entire breed, it suffers from chromatic aberration,
“excess” color around bright objects. You can reduce chromatic aberration in an
achromat by using objectives with slow focal ratios. Unfortunately, the AR102’s
objective, an f/6.5, is not slow enough to do much to eliminate excess color.
To reduce chromatic aberration to low levels with a 4-inch objective, you have
to go all the way to f/15, the focal ratio of John Mallas’ Unitron. There would be chromatic aberration. The
question was “How bad?”
Certainly, I hadn’t noticed purple around any of the objects
we’d looked at thus far. But I wouldn’t expect it with deep sky objects and
dimmer stars. Where it really shows up is with the Moon, the planets, and
bright stars, stars brighter than about magnitude 2. The Moon wasn’t available,
and Venus was now behind a tree, but Vega was riding high. Mashed the buttons
to get me to “Named Stars,” and punched up “Vega.”
Alpha Lyrae in the field, I took a critical look with all
three of my standard eyepieces, the HHG, the 13-mm Ethos, and the 8-mm Ethos.
Verdict? Oh, there was color, but it wasn’t nearly as bad as I’d feared. It was
noticeable, but when I was critically focused it was genuinely unobtrusive, a
small violet halo. No doubt Venus would have been a purple-people-eater horror,
but I don’t look at Venus much, and when I do, I don’t use a 4-inch wide-field
scope to do it.
Whew! Glad we got that settled. What now? More wide-field
beauties was the answer, but before I did that, I decided to do a new go-to
alignment. I got the correct stars centered this time, including that rascal
Fomalhaut. It wasn’t really that hard
with the finder—guess my excitement and impatience had been most of the
problem—but I am still going to see if I have a suitable red-dot finder for
this telescope.
Looking up, I saw Cygnus was now straddling the Meridian. What
better time to go after one of the more challenging big nebulae, NGC 7000, The
North America Nebula? I had good success with it the previous year at DSRSG
with the StarBlast, but I was still after a definitive look at that wonder after five decades of hunting for and looking at it.
Mashed the buttons, the VX hummed, and we were there.
Before having a look, I switched eyepieces, to one of my old
favorites, TeleVue’s 35mm Panoptic. I’ve had that ocular for years and consider
it a classic, even though I am not usually a fan of lower powers. I will say
that when you do need low magnification there is no better way to get it than
with a 35 Pan. It is far more comfortable to use than most eyepieces of its
focal length. Its eye-relief is not too long, and it doesn't suffer too much from
“blackout” if your eye is mis-positioned.
Alrighty, then, what do we have here? A quick look showed something in the big field, something
faintly nebulous twining through the clouds of stars. How about adding the UHC?
Good thing Unk’s sneakers were tightly tied; otherwise my socks would indeed
have been blown off after I screwed on the filter. There it was. The nebula, and especially the “gulf coast” region,
was—dare I say it?—bright. Slewing a little even turned up the freaking Pelican
lurking down in the starry Caribbean. No, even at 19X I couldn’t quite frame
the whole thing, but it was good enough. Man, was it ever. I have never, ever
had as good a look at the N.A.N. This single observation made the whole night
worthwhile.
NGC 7000 was so cotton-picking good I decided I’d go after its
e’en tougher sister over in Perseus, NGC 1499, The California Nebula. I wasn’t
quite sure what to expect. It had been visible
with the StarBlast and an h-beta filter the previous year, but was not easy. VX
hummed, I looked into the Pan, and was soon hollering, “Jon, get over here!”
There it was, running down the center of the field as an easy to see stripe of
nebulosity. Jon and I scanned up and down the huge thing for a while—we spent
the whole evening calling each other over to our AR102s for looks at one wonder
after another. Only bummer? If only I had had a 2-inch h-beta filter for the 35
Panoptic. The UHC worked but was not optimum for this deep red object.
What impressed me even more than the way the AR102 had shown
up the two legendarily dim nebulae? How well the scope’s focuser worked. It
never slipped, even with the big Panoptic, and its action was smooth and responsive no matter where I
pointed the scope and no matter whether I was using the course or fine focus
knob. The fine focus? With a fast scope that tends to snap into focus, it sure
is a help.
I knew that anything else I’d look at pre-M42 would be a letdown
after those two stupendous nebulae, but I had a lot of fun while waiting for
M42 to rise above the trees. Most of that fun came from running through the
objects in one of Sue French’s “Deep Sky Wonders” columns. Doing “Sue’s
objects” is a tradition for me at Deep South, and I thought I’d give her
November 2013 column, “Friends,” a spin.
Before I could do that, though, I had to zap some dew. I
didn't have a 4-inch dew-heater strip, so I made do with an 8-incher, wrapping
it around a couple of times. I wasn’t sure how well that would work and,
especially, whether it might not get too hot, so I set the DewBuster controller
for 5-degrees above ambient. It was humid, but not as bad as Friday, so I hoped
that would be enough. The result was the objective dewed-up not long after we
left the California Nebula. Luckily, I found I had a 12-volt hairdryer/dew
zapper in the equipment case—I initially thought I’d left it at home. I zapped,
cranked the ‘Buster up to 10-degrees and had no further dew problems.
Sue’s Friends
It had been a long time since I’d spent much time in Cassiopeia.
Maybe not since I woke up one morning with the idea to view as many open
clusters there as I could for my book The
Urban Astronomer’s Guide. So, it was like old home week. Sure I’ve seen M52
and M103 in the interim, but a couple of Ms. French’s other picks were like old
friends I hadn’t seen in too long a
time.
M52. I very much agree with Sue’s description of
this cluster, which, like me, she observed in a 4-inch refractor. As she says,
it is a “swarm” of fifty or more small sparklers packed into an area of about
15’ diameter. Sue doesn’t mention it, but to me the central area always looks triangular
in a smaller scope.
I ain’t much on asterisms, so I skipped the next Friend, “the
Airplane,” and headed onward to another open cluster, Czernik 43 that is just southeast of M52. It was quite marvelous in
the refractor; at low power it looks like a “detached” part of M52 and is
equidistant between the Messier cluster and a magnitude 6.6 star 14’ farther to
the south-southeast.
One of the great things about Sue French’s columns is that
she offers up a nice variety of objects each time. Next was a faint emission
nebula, NGC 7635, The Bubble Nebula, 30’ to the southwest of M52. Sue calls it
“faint” in her 130mm refractor, and it dang sure was in the 102mm. It was
visible in the OIII filter equipped 13mm Panoptic, but just barely as a faint
haze. The “bubble,” which had shown itself so starkly in the Edge 800 and
Mallincam the night before was nowhere to be seen. That was okay. What I could
see, a rectangular swath of nebulosity made a beautiful field even more
beautiful, even with the star-dimming caused by the filter.
From the Bubble, Sue takes us to a double star. I like
double stars, but wasn’t in the mood on this night, so I pressed on to King 20,
an open cluster. This little group is mainly distinguished by being near a
prominent multiple star system, AR Cassiopeiae, which is 26’ to the west. What
I saw was pretty much what Sue French saw: a misty patch of starlight framed by
a triangle of dim resolved stars. The tiny, misty stars that form the cluster
itself tended to wink in and out as the seeing (which was not ever very good on
this night) changed.
The last Friends object was, believe it or not, Cassiopeia
A, the supernova remnant left over from a supernova (unobserved) that lit-off
in the last years of the 17th century (maybe). Sue could see it with a
9.25-inch SCT, but I certainly didn't get a hint of it with the 4-inch refractor.
Sounds like a job for the Mallincam.
Sunday morning... |
I intended to make it an early night because of that
inevitable packing and drive home in the morning-time, but after I’d done the
last of Sue’s Friends, M42 still wasn’t quite high enough to look at. I spent
the next hour zig-zagging across the sky to a variety of objects. Everything
from bright wonders like M2, M1, and M30, to Herschel 400 objects. I was
pleasantly surprised that the AR picked up every 400 I tried. Yeah, I know
Steve O’Meara did ‘em all with a 4-inch refractor, but I don’t have his eyes or
skies.
Finally, M42 was well above the trees. I'd stuck to the rule my old friend Pat Rochford and I formulated a long time ago at DSRSG, back when the star party was at its original and legendary home, Percy Quin State Park: “No
going to bed till the Great Nebula is good and high.” The greenish color
that is sometimes visible was particularly strong on this evening, and even at
41x the Trapezium’s minuscule stars were so well separated I coulda drove a
truck through the spaces. The nebula’s glowing clouds just seemed to go on
forever.
I was so hyped up by the sight of Orion (and maybe the
Monster Energy Drink I’d chugged about an hour before), that part of me wanted
to stay up for ISON. And maybe even linger
through Sunday night. That would have been possible, but there’d have been no
supper served Sunday evening, and we might have had to move to a cottage. In
the end, I decided that, as always, The Only Enemy of Good Enough is More
Better (Gooder). After four days at FRC it was time to get home to the Old
Manse.
Back at the Lodge, it wasn’t quite 2 o’clock, and I spent an
hour watching DVDs, surfing the pea-picking Cloudy Nights, and thinking about
the 2013 edition of the Deep South Regional Star Gaze. Over the years, there've
been good ones and not so good ones, same as with any star party. 2013 wasn’t
the best ever—that was 1994, the first year I had my new wife, Dorothy, at my
side—but it was a goodun, best in years. Will I be back next fall? Sure hope
so. If we do a spring edition, I dang sure intend to be onsite for that, too.
Deep South Forever, muchachos.
Next Time: Destination Moon Night 3...
Sunday, November 10, 2013
Operation Arp Night 3: 105 Down, 234 to Go
Well,
muchachos, another Halloween has come and gone. Believe it or no, your old
Uncle didn't get a bag full of rocks this year. I
got a telescope full of Arp galaxies. Y’all probably thought I’d forgot all
about those little sprites. It’s been dang near ten months since you
heard anything about my “next” observing project, the one that came after The
Herschel Project, Operation Arp. Which is my quest to observe
(mostly with a Mallincam video camera) Halton Arp’s disturbed, weird looking,
and otherwise strange galaxies.
The reason you
haven’t heard anything more about Operation Arp isn't that I’ve lost interest
in bagging those distant and sometimes dim galaxies. It is admittedly a less absorbing project than
hitting the Herschels was, but that’s not why O.A. has been on hiatus. The reason,
as I don’t have to tell those of y’all who observe from below the Mason Dixon
Line, has been the weather.
The rest of
the country has had its share of cloudy nights over the past spring and summer,
but the Southland got hit particularly hard. I had two semi-good nights at the
Chiefland Astronomy Village last January, knocking off 28 Arps and
a passel of Herschels I needed re-image, but that was near about
it. The single halfway decent evening I got at the Deep South Regional Star Gaze Spring Scrimmage in May was not good enough for Arp
galaxies. There were clear nights here and there after that, but mostly when
there was a fat Moon in the sky.
The weather situation
has finally turned around—sorta. Possum Swamp is still getting plenty of
rain—we always do in the autumn—but at least it is interspersed with passing
cold fronts that clean and clear the sky temporarily. And it even looked like that
might happen during one of our favorite star parties, the Deep South Regional Star Gaze, now held near
Norwood, Louisiana. We’ve been doing DSRSG almost every year for two decades,
and it’s tops with us for good facilities, good skies, and good folks.
Who doesn't want fried chicken for breakfast? |
Maybe. By
the Monday preceding the star party, the weather outlook for Louisiana was
getting worse by the minute. There’d be zilch Wednesday, Thursday, Halloween
night, would be worse with (possibly) violent storms, and Friday, which had
looked so good, was now tending to “partly cloudy.” Should we wait till Friday morning
to leave? Maybe still go as scheduled on Wednesday but not try to set up on the
field that day?
After some
consideration, we decided to depart Wednesday as planned. Our meals and lodging
were paid for, and, as I’ve often said, we always have fun at a star party
clouds or not. Should we delay setting up the gear for a couple of days? That
was a possibility depending on how bad the forecasts became. I at least wanted
to claim one of the limited number of field power outlets on Wednesday.
Tuesday,
following a run on Target for supplies that included propane bottles for my
Black Cat heater, Jack Links and granola bars for on-field snacking, bottled
water, and—natch—Monster Energy Drinks, I got to work loading Miss Van Pelt,
our 4Runner. Some time back, I did a blog on star party packing, and in the course of that did some serious cogitating on
how best to load the truck. Following my own suggestions from that blog, it was
amazing how easily the astro-junk went in Miss Van Pelt this time. Easy or
hard, it is fracking wonderful to get the packing done the night before a star
party. Not having to face that makes departure morning an absolute joy.
Wednesday afternoon on the observing field... |
After a
fairly restful evening—I really went to bed too early—I was up at 6 a.m. and
rarin’ to go. Miss D. was already bustling about. I checked my always copious
email, laid out the cats’ provisions, made one last gear check to ensure I
hadn’t forgot anything important—I know I am always going to forget something—and me and D. hit the road for
the wilds of Louisiana. Well, we hit the road after a stop at the neighborhood (downtown) Mickey D’s where Unk
feasted on a fried chicken biscuit as per normal.
The just
over three-hour journey to DSRSG seemed to go faster than ever before. In fact,
it was faster. Our new GPS, a Garmin,
which replaced the Tom-Tom some light-fingered miscreant helped himself to, had
a new and quicker route planned for us. After you leave I-10, I-55, and I-12
behind, there are miles and miles of two lane country roads to face. The GPS had
discovered a new route that cut nearly half an hour off our usual time and was considerably
more direct.
Afore long,
we were turning off at the Feliciana Retreat Center (FRC) sign and driving onto the
well-remembered grounds. This was our fourth year at this Presbyterian church retreat (D. and I missed 2011),
and it had now assumed the familiar and friendly feel of our previous venues,
Percy Quin State Park and Camp Ruth Lee.
The Lodge rooms are small but cozy... |
Gear set up
on the observing field was not exactly a joy, but it was bearable. In advance
of the storm front, temperatures were kicking up into the dadgum 80s, and it
was a little sticky. I was tired and sweaty by the time Mrs. Peel was on her
mount and the tailgating canopy was up, and was dang sure glad I’d worn shorts.
Miss Van
Pelt unloaded, I connected to the field’s power board with the el cheapo
100-foot extension cord I got at the Wal-Mart. What a relief it would be not to
have to worry about batteries to run scope, computer, and dew heaters. I power the Mallincam Xtreme off a battery in the interest of obtaining the
cleanest video possible, but even though the camera has a Peltier
cooler, it is a current sipper. I could probably run it for a couple of nights
on its jump-start battery.
Over to the
Lodge to unpack. Yes, the rooms are tiny, but they are clean, air-conditioned/heated,
and have individual bathrooms. No, it’s not like spending a night in the Ritz—or even in the Chiefland Days Inn—but it is one hell of a lot better than
the dirty, buggy chickie cabins we suffered through at our previous location, nearby
Camp Ruth Lee, for four years.
What next?
We hung out on the field talking to old friends, many of whom we only see once
or twice a year, fiddling with the gear, walking about, and just relaxing—which is almost as big a reason to go to a star party as observing is.
After the first raffle giveaway, where Unk, as usual, didn’t win a thing, it
was time for supper.
To say the
food at Feliciana is a cut above normal star party fare is to way understate it. Not only are the victuals
considerably better than the “edible” you get most places, you eat ‘em in attractive
surroundings. The traditional first night entree, grilled chicken, is not my
fave, but either it had improved this year or Unk was hungrier than normal. I
gobbled it up along with a large salad from the (yes) salad bar and a huge hunk
of frosting-slathered carrot cake.
After the meal,
I had two goals: walk off all that food,
and take a critical look at the sky. The field is about a quarter mile from the Lodge and the last thing I want is to have to hike out
there in the middle of the night in a storm to secure the gear like I had to do
in ought-nine. I’d already staked down the
tripod of Emma’s VX mount just in case, but if it was evident bad stuff was on
the way, I wanted to move anything that might be damaged by rain or wind into
the truck. Including Mrs. Peel. I didn’t fancy spending the evening fretting
about my beautiful C8, and wind up getting dressed and going out to the field
in the middle of the night to pull her off the mount like I did last spring.
It didn't take much looking in the sky to see nasty weather was in the offing. Heck, you
didn’t even have to look. There was a still, quiet, uber-sticky feel to the air
that said, “storm’s a-comin’.” I moved what needed to be moved into the
4Runner, including the C8, and pounded in my tent stakes a wee bit more.
Particularly those securing the tarps we attach to the Coleman tailgating
canopy to form its sides in cold weather. Following the front passage,
temperatures were supposed to fall into the lower 40s, if not lower.
After I’d
done all I could to prepare for the weather, I spent an hour or three visiting
with my fellow Deep Southers on the field. Till the humidity and skeeters got
to me. This location normally does not have much of a mosquito problem, even in
the spring, but the current conditions were bringing in waves of ‘em. I headed
back to the Lodge, where I spent an hour or two looking at DVDs on my laptop,
episodes of Star Trek’s first season,
including one of my favorites, “What are Little Girls Made Of?” before packing
my bags for dreamland.
A big southern breakfast took our minds off the weather... |
Thursday
dawned. Well, sort of. The thick clouds of Wednesday were thicker than ever. I
hadn’t been awakened in the middle of the night by thunder-boomers as I had
been in the spring, but when I poked my head
outside after I’d snagged a cuppa java from the dining hall, it was already sprinkling
rain. To top it all off, a look at wunderground.com on the laptop (FRC's Internet access was much more reliable than in the spring) showed we were under
a freaking tornado watch.
After a
traditional southern breakfast (biscuits, sausage, grits) I headed to the field
while I still could. Actually, the rain mostly
held off through early afternoon, and I was able to spend some time out there with
my friend, former student, and Escambia Amateur Astronomers’ Association
President Jon Ellard. That young man is one of my astronomy success stories,
and anybody who thinks amateur astronomy doesn't have a future only needs to
look at him and younguns like him—and there are many more of them than you
might think.
I was also
pleased to see long-time Astronomical League figure Mike Benson had arrived.
Dorothy and I hadn’t seen Mike since 2003 when he and the Barnard Seyfert
Astronomical Society had Unk up as a speaker at that year's Tennessee Star party. Mike
was onsite to chair a meeting of SERAL (Southeast Region of the Astronomical
League) Friday afternoon, and Dorothy and I were looking forward to that.
Udder than
that? Thursday was purty much like Wednesday till mid afternoon. Until about
two o’clock, when the rain sprinkles came back and this time did not diminish.
By supper (FRC's legendary pot roast and mashed taters), it was pouring. How
did I spend a rainy Halloween night? Jon and I had planned to dress as Obi Wan and Luke and give light saber
demos on the field (no, I am NOT
kidding), but the wet conditions and lack of kids on Thursday dissuaded us. Next year, y’all.
And the rains came Thursday... |
Instead, I
watched one of my favorite Halloween flicks, maybe my favorite Halloween movie
of all time, The Rocky Horror Picture Show, thanks to a DVD DSRSG Managing Director
Barry Simon brought along. Sitting with my buddies watching it on a big-screen
TV in the lodge, I wished I had rice to throw. Back in the room, I viewed the
DVD of It’s the Great Pumpkin, Charlie
Brown like I do every October 31, and was soon dozing off to the sound of
rain on the roof.
Come Friday
morning, I was almost afraid to look outside. Fronts have been known to stall
out, after all. Fueled by plenty of coffee, I worked up the nerve and had a peep.
The sky was not cloudless yet, but that was obviously the way it was headed.
There was a good breeze, and the temperature was in the low 60s or maybe even
the upper 50s. That sure perked me up and helped me enjoy a breakfast that was
even more southern than before, adding sawmill gravy to the down-home mix.
The question
Friday wasn’t “What do I do all day?” but “How do I do everything today?” In
addition to getting the repacked gear unpacked, the scope back on her mount,
and the things that had got wet dried out, there was a presentation to hear,
that SERAL meeting to attend, and the first big raffle giveaway’s prizes to
drool over.
First up was
one of the best presentations I’ve heard at a star party in a while, Walt
Cooney’s talk on amateur contributions to the science of astronomy, and in
particular CCD photometry of asteroids. I don’t normally think of DSRSG as a
star party that’s big on presentations; I think of it as being more focused on
observing and having fun, but there have been some real good talks over the years. Walt was followed
by the SERAL meeting where old and new business was addressed and Unk and Jon
were installed as SERAL officers. I have been known to complain about the AL,
so it’s high time I put my money where my mouth is and pitch in and help out, I
reckon.
D. and her beautiful new scope... |
Miss Dorothy
feeling better, the next thing on the agenda was the raffle at 3 o’clock. I
often say I never win anything at a star party, but that ain’t strictly true. I’ve
had a right good record of picking up little stuff in recent times. I got a
cable to allow me to control the telescope with my iPhone at the AHSP this year, and I won a camera mount for the
iPhone at the Friday afternoon raffle. That was cool; I’ve had a lot of fun
just hand-holding my phone camera up to the eyepiece, like I did Friday
afternoon to capture a cool Solar flare through Jon’s H-alpha scope. But that
was small potatoes compared to what Dorothy
won.
Miss D. has
been a consistent winner, but I was still amazed when her name was pulled for a
beautiful Explore Scientific AR-102 refractor. Yes, Dorothy had won a big,
beautiful telescope. This wasn’t the only big prize donated by Explore Scientific to our little star party,
either. In addition to yet another 102, there were several of the company’s
fantastic eyepieces. Scott Roberts and his colleagues sure have my gratitude
for their kindness and generosity to their fellow amateurs. As I always say,
when you need astro-gear, buy it from somebody, support somebody, who
supports us.
You’ll get a
full report on Dorothy’s new telescope and the last day of the star party,
Saturday, next week. For now, all I’ll say is her scope looked luscious when I
pulled it out of the box to check the ring/dovetail situation and see if it
would be likely to balance on the VX with the single counterweight I’d brought
along. I was tempted to mount her on the VX right then and there, but Mrs. Peel
and the Mallincam Xtreme were ready to go, and I wanted to hit the deep, deep
sky hard on this first good night.
Supper,
which was a somewhat odd but good concoction, fried catfish with a side of
shrimp scampi, came and went, the skies held, and soon enough it was time to
get the scope cranking. I’d considered several observing projects for this
year’s DSRSG, but the only one that had much appeal was the aforementioned
Operation Arp. If there’s anything
negative to be said about it, it’s just that it is all galaxies, and, since I
did so many, many galaxies in the course of The Herschel Project, it would be
nice to look at something else for a change. At least the Arps are usually interesting galaxies, so that’s what I’d
do Friday night.
iPhone Sun... |
Since it was
not dark enough to get started with galaxies right after AllStar was done, I
essayed a second go-to alignment. I had moved the mount a fair distance in the
course of the polar alignment, after all. Even so, my go-to accuracy would
probably have been fine, but since I had the time for a redo, why not?
Did a quick
series of go-tos to M13, M57, and a couple of other pretties to make sure mount
and Mallincam Xtreme were doing their things as they should be, fired up SkyTools 3, and hit the Arp list. Since
I’d knocked out less than thirty of the suckers on that winter night down in
Chiefland, I had plenty of fuzzies in plenty of constellations to choose from
under galaxy-laden fall skies. One
difference from that night in Chiefland? I upped my exposure from my customary
14 seconds to 28 in hopes of catching more detail. Ain’t much point in doing Arps
if’n you ain’t going after details, is there?
I was
pleased at what I brought home, 77 Arps, most of which looked purty good given
a night that started out humid and ended up with ground fog aplenty. Now, don’t
get skeered, y’all. I ain’t gonna rattle off the vitals of all 77 galaxies. I
would like to share a few of my favo-rights from Friday night with you,
howsomeever…
The Arps
“Arp 295” consists two interacting galaxies,
PGC 72139, an edge on, and an intermediate inclination companion, PGC 72155, 4’36”
to the northeast. PGCs have a reputation for being tough, but these two are in the magnitude 14.5 range and not hard. I couldn’t
see the tidal tails that link the galaxies in their POSS plate, but it was
obvious the edge-on is disturbed.
Arp 15 (NGC 7393) in Aquarius looks very much the same
on my monitor as it does on its POSS image, a bright golden center with arms
that seem bent back upon themselves. This galaxy was noted for its “detached”
segments by Arp. That’s not obvious, but its peculiar semi-ring shape is.
Aquarius' NGC
7727 is also Arp 222, a large
face-on spiral that is pretty obviously interacting with a smaller galaxy, NGC
7724, which is 12’ to the northwest. Despite a bright background sky to the southeast, I could see
a large and distorted spiral arm just like in the POSS plate.
Arp 325, which has a quoted magnitude figure
of 17.9, is easy to see because the galaxies that make it up are tiny and star-like.
They are small enough that it’s hard to tell exactly how many of them there
are, but I thought I counted five. These little fellers form an Arp because they
constitute a galaxy “chain,” one of Chip Arp’s categories.
Not all Arps
are 17th magnitude ghosts. There are even a few Messiers among them including
good, old M32, Andromeda’s little companion, which is in the catalog as Arp 168. Why it is an Arp is not clear
to me. M32 is listed among the Arps with “diffuse counter tails,” but what or
where that is, I don’t know.
Arp 273 in Andromeda is a strange sight. It’s
a confusing welter of spiral arms that seems indecipherable until you realize
you are seeing two colliding galaxies, PGC 8961 and PGC 8970, whose skinny arms
are nearly intertwined. At magnitude 13.8, this is easy and gives up
considerable detail.
I liked all
the Arps I hit on this night, and I saw some interesting details in almost every
one, but for now, I’ll end with one of the most spectacular members of the
catalog, Arp 37, another Messier,
Cetus’ M77. This bright Seyfert galaxy is not numbered among the Arps for that
reason, but because there is a “low surface brightness companion” in the field.
What that is, I dunno. The obvious candidate is LEDA 1154903, which is dimmer
than magnitude 17, but it is over 10’ away. I couldn’t find the answer to this and
some other Arp questions I had on the Internet, so it’s probably time for me to
buy Jeff Kanipe and Dennis Webb’s The Arp Atlas of Peculiar Galaxies, I reckon.
What will I
remember most about this night? Mainly that it seemed so simple. Once the VX was aligned, she didn't miss a fracking go-to.
The Mallincam just worked; the only
adjustment I made all night was changing the exposure time occasionally. It was
all so easy I was amazed at the end of the evening when I toted up my targets
and found I’d done about a hundred DSOs including the nearly 80 Arp galaxies.
The O.A. score thus far? Including this haul, 105 down 234 to go.
“All good
things,” they say, and for me that began as the local time display on SkyTools 3 ticked on toward 1:30 a.m.
The lower part of the field was beginning to be covered with ground fog, and I
figured it would be my turn soon. I was also beginning to feel a little weary. The
dampness was sapping my energy even though I was comparatively warm and dry
under the canopy with the Black Cat catalytic heater running. Even my second
Monster Energy drink of the night failed to fully restore me. I called a halt
to the Arps—I’d got most of those high enough in the sky to fool with by now
anyway—and had some fun.
The funnest
of my fun objects? Probably M33. It was riding high and was just tremendous in
1-minute exposures. I’ve rarely seen it look more like the wild-armed spiral it
is than on this night. Not only that, it was peppered with red HII regions on
my monitor. Its appearance was just magnificent, and is only hinted at in the
single-frame grab here. Just before shutting down, I had a look at little Comet
Brewington, who at least looked like a comet, if not much of a comet. It had
been my plan to stay up for ISON, who would be well up for me by 4:30 a.m. or shortly
thereafter, but that was not to be. There was no doubt we’d be socked in-by
then.
I've loved M33, the Pinwheel, since I was a sprout... |
At 2:30, low
clouds had indeed closed us down and it was Big Switch Time. I shut everything off,
tucked Mrs. Peel in with her Desert Storm cover, grabbed the laptop, and headed to
the Lodge. There, I spent equal amounts of time watching a dadgum DVD of UFO Hunters and ruminating on observing
projects. I am for sure continuing Operation Arp, but I would like a second and maybe larger project to work
on, something with a little more variety.
I think I have that project, and will tell you-all about it in due course.
As for
DSRSG? We are out of space and time for this edition of the Little Old Blog
from Chaos Manor South, Unk having far exceeded his usual self-imposed verbiage
limit. So, we’ll be back at the Feliciana Retreat Center again next week for
some time under the stars with Dorothy’s new refractor. Since Unk is not known
for his knowledge about or expertise with lens-scopes, it should be “interesting,”
to say the least, muchachos.
Nota bene:
If’n you’ve a mind, you can see lots more pictures from DSRSG 2013 on
Unk’s Facebook page.
Next Time:
Through a glass but not darkly…