Uncle Rod's Astro Blog

 

We preempt your regularly scheduled program… Originally, thisun was gonna be about me, your Old Uncle, turning my SeeStar S50, Suzie, and 10-inch Dob, Zelda, loose on the fall globulars chapter in UAG (“The Urban Astronomer’s Guide,” for the uninitiated). Then, as it sometimes does, everything—well, a couple of things—changed.

Thanks to the kindness of a friend of mine, Jack Estes, who is also a longtime friend of this here AstroBlog, and an amateur astronomer/imager extraordinaire, I was able to level up in the smartscope world. To the tune of Unistellar’s Equinox (the first iteration as opposed to the new Equinox 2).

“What in pea-turkey is they-at, Unk?” It’s a smartscope, Skeeter, you might say the smartscope that set the pattern for what these instruments would be like. Specifically, it is a 4-inch (114mm) reflector with its secondary replaced by an image sensor. It is made by a French company, Unistellar, which now offers several rather advanced smartscopes.

Other specifics? The Unistellar is as above a 114mm reflecting telescope, one with a focal ratio of f/4, meaning its focal length comes in at 456mm. Like almost all other smartscopes, it rides on a one-arm goto fork mount. Other than that? It features a Sony Exmor IMX224 imaging sensor with a field of about ½ degree. Also like her sisters, the Equinox is powered by a USB-C rechargeable battery and operated via wi-fi with an app on your smartphone.

That was what I had gleaned from talking to Jack, reading the manual, and watching cotton-pickin’ YouTube videos. That reading and watching (and downloading of the iOS app) done, I began anxiously awaiting the scope’s arrival at Chaos Manor South…

Your impatient old Uncle didn’t have long to wait. In just a few days, a largish box was on the doorstep of Chaos Manor South, and your decrepit correspondent had somehow manhandled it into the Sunroom, traditional staging area for new (or at least new-to-me) telescopes. I went to work, aided by Wilbur Wright, second in command of our feline detachment.

What was inside that box? An attractive and light—but not too light—and sturdy tripod. With the legs fully extended, it was a smidge over four feet in height; ‘bout the same as my Manfrotto. And there was the telescope herself, a pretty, two-toned black and gray thing on her one-arm-bandit mount. Finally, there was a small box of accessories that contained a charger, some extra knob-headed bolts (for the tripod I presumed), and a set of Allen wrenches for collimation. All in all, Unistellar’s box/presentation reminded me of what Apple might do if they sold telescopes. The lid of the inner box was emblazoned with the words, “Prepare to be Amazed.” We’d see, I reckoned.

Hot dog! New telescope (are there any sweeter words than those?)! I’d get her into the backyard and get ready to go! Not so fast, Unk, not so fast. In the excitement, your silly Old Uncle had forgot this was the evening of the Mobile Amateur Radio Club’s yearly TNXgiving Potluck dinner party with our sister club, the Deep South Amateur Radio Club. 

Being President of the MARC, it was incumbent upon Unk to be there, natcherly. I told Miss Dorothy, “Guess I’ll try the new telescope when we get home.”  She just laughed. Indeed, upon our return I was way too tuckered to do anything other than imbibe a few cold 807s in the company of the cats as we watched silly YouTube videos. “Tomorrow night, for sure!”

Strangely, the arrival of the Unistellar Equinox had coincided with a short span of cool and clear evenings. Only downer? There would be a fat Full Moon on the rise. I hoped to get in a few minutes with the Unistellar before Luna got too high. While Jack had provided me with some instructions to get me started beyond what was in the manual (typical of today’s manuals) and on the Unistellar website, I still felt like I was flying by the seat of my pants when I headed for the backyard with this sizable smartscope (still very manageable for Unk, nevertheless, at about 20 pounds).

Out in the back forty in my customary spot adjacent to the deck, I got the scope mounted on the tripod—by means of lowering its base into the custom-style head and fastening a couple of retaining bolts. Now to wait for darkness, which, thankfully, is arriving at a decent hour now that that dadgum DST has been turned off. Standing there in the gloaming, I had to admit the Equinox looked impressive—and a lot more “telescopey” than the oddly shaped (sorry, girl) Suzie.

When darkness fell, I finally got started. First step was powering up the Equinox via a pushbutton switch not unlike that on the SeeStar. Scope on and button illuminated a purplish hue, I connected to the scope with the Unistellar app for the first time. Now, I relied on what Jack told me to do in his quick start instructions, beginning with leveling the tripod, which I did in rather hurried fashion. Your jaded old Uncle had to admit he was now right excited about this 4-inch telescope.

Hokay, the app said I was connected to the scope, so this was rubber-hits-road. Next step would be moving the OTA to an altitude of about 45 degrees. After a bit of fumbling around to figure out Unistellar’s onscreen joystick trope, I got the tube pointed at said 45 degrees. Hell, y’all, I even remembered to remove the aperture cover! I gotta tell you I was heartened by the sounds the Equinox made as I slewed her. None of that old-timey Meade-style weasels with tuberculosis noise. The sound emitted by her altitude motor was sure and steady.

Next up? Time to do what Unistellar calls “orientation.” What I call it is a “plate solve.” Mash the appropriate button on the app, and the Equinox takes pictures and figures out where it is from the star field. It seemed to me this worked—near as I could tell from what the app said. Before trying a goto, however, I would need to take a manual dark frame, which Unistellar refers to as a “sensor calibration.” I might have figured that out on my own eventually, I reckon, but thank goodness I had Jack’s quick-start instructions.

The Equinox does not have automatic focus, so you focus manually by turning the large knob at the rear end of the tube, which I assume moves the primary mirror forward and back leaving the secondary (the camera) undisturbed. While the quick-start instructions Unistellar furnishes advise you just to focus on a starfield by eye, Jack told me to go whole hog in Bahtinov mask function.

With only a mite of fumbling, I found Altair in the app’s object list (the Unistellar app works with lists rather than a star atlas) and sent the scope there. The Equinox hummed reassuringly, headed in the proper direction, and soon had Altair in the frame. I centered up a little bit and installed the Bahtinov mask—a plastic one that is normally stowed attached to the aperture cover. As Jack had instructed, I used the onscreen live-view controls to make Altair pretty dim, and focused till the star spikes were properly spaced. Focus wasn’t far off to begin with, testament to the scope’s mechanical quality, but I could have done better. I should have zoomed in on the star a bit, but, yeah, I was excited. I got OK focus.

Now came proof in the pudding time. First light object? I figgered M57 would be it. Nice an’ bright, but also small. I wanted to see what a smartscope with more focal length would do for me. So, having found that magic Ring in the apps list, I sent the Equinox that-a-way, and held my breath…

When the Equinox stopped, there was that glorious ring. Was it huge on the phone? No. But it was considerably more than the wee spot it is with the SeeStar. While Suzie’s ring is identifiable, good luck being able to make out the central star no matter how much you zoom. With the Unistellar, even unzoomed on the phone screen, I could see the center of the Ring wasn’t dark and make out there was something else there. Just a bit of zooming/cropping, as you can see here, delivers that central star detail on the Ring itself. Was I happy? You betcha.

Alas, wouldn’t you know it? By now the clouds was rolling in. I did do two other objects in quick succession, M2 and M56. One thing I noted on both objects? The exposures went quickly with no frames dropped. It’s normal for the SeeStar to reject a sizable number of due to star trailing. The Equinox’s tracking was better. In part, that’s attributable to the shorter 4-second exposures, but I suspect the gears are a lot more refined than those in li’l Suze.

Shorter exposures were not a problem, by the way, thanks to the Equinox’s sensitive camera. Almost too sensitive if’n you ask me. My single problem at first light was blowing out the cores of globs (as you can see, M57 is also somewhat overexposed. I didn’t have a clue about settings for exposures on this first night. Ah, well, NEXT TIME. And rest assured, you will learn a lot more about this amazing telescope in the future. And with that, Evie’s first light night with me had come and gone.

Evie? As you well know, all my scopes tell me their names. For some reason, I thought that would take a while with this one. Nope. As we were headed back to Chaos Manor South’s den for cold 807s and TV with the felines, the girl said,

“Hey, y’all! I’m Evie! Unk, are we gonna be friends?”

“We sure are Evie, we sure are!”

Note that the Equinox saves photos both in this format and standard presentation.

But I said changes, and I meant more than one. The arrival of Evie was just the first change at smartscope-crazy Chaos Manor South! I soon learned I’d got the assignment for the Sky & Telescope Test Report on ZWO’s new smartscope, the S30. You’ll learn all about it in a coming issue of S&T. Stay tuned…

Next Time:  As has long been the tradition ‘round Chaos Manor South and the Little Old AstroBlog, next month’s entry will appear on Christmas Eve and will maybe be a mite more sentimental and briefer (well, maybe) than usual. See y’all then.

Nota Bene Department:  I had a request for the observing list from The Urban Astronomer’s Guide in computer form the other day. I rummaged around and found that despite the shutdown of the Yahoogroup that supported UAG with observing planner files, I’ve still got one. Specifically, it’s in SkyTools 3 format (which some other planning programs will be able to import). If you’d like a copy, shoot me an email at rodmollise@southalabama.edu and I’ll get the file on its way to ya.