Sunday, March 20, 2011

Somewhat larger than average, like the Moon!

Much was made by the media of the so-called "super moon" which was a rare combination of a full Moon phase with Earth's one satellite reaching the perigee, or low point, of its orbit; in this case reaching a distance of 221,567 miles. One attention-seeking astrologer went to far as to suggest the coming lunar event possibly caused the terrible earthquake and tsunami that devastated areas of Japan on March 11. Of course that disaster occurred a full week before the "super moon" happened and the Moon was well within its normal distance range from its parent Earth. The good that did come from the attention was that people were interested in seeing our friendly Moon at its best and brightest. Stephens Memorial Observatory had already scheduled a season-opening Public Night for March 19 --the night of the so-called super moon-- which worked out well. The evening sky was clearer than it has been in quite some time and visitors began arriving early (well before Luna had risen above our local horizon). Though they enjoyed excellent tales and views of stars Sirius and Betelgeuse, and decent looks at the constellation Orion and the Great Orion Nebula, they really wanted that Moon! As soon as it cleared neighboring trees, we trained the old 9-inch refractor on Luna's orange face. I was astonished at the detail I was seeing in the crater ejecta and other markings on the lunar surface; I don't believe I've ever seen those details so pronounced in any previous viewing. I regret not being able to capture that view as a photograph. Other eyes, however, eagerly awaited their turn at the telescope. As the evening progressed and the Moon rose, those details faded and we were left with more typical but still very good views (for so low to the horizon) of Earth's nearest neighbor. Visitors climbed the ladder one-by-one and most were astonished by what they saw. The grand old Cooley Telescope and its 110-year-old optics continue to excite! By the time I closed the door, we had hosted 48 visitors which, while not a world record, was somewhat larger than our average night ... a bit like the Moon itself!

Friday, January 21, 2011

Ugh (again)! This weather!

Just now I canceled yet another Public Night scheduled for Stephens Memorial Observatory. It was set for January 22. Weather for that night is expected to be cloudy to fully overcast with a predicted temperature of 13 (F) degrees at the scheduled starting time, and a 40 percent chance of snow! Just too much. I should have followed through with my resolution to not schedule any open nights for January or February due to the usually poor skies and winter weather conditions. Taking my own advice, I won't set up anything for the public until March!

Through a hole in the clouds I did get a naked-eye glimpse at Orion's sword the other morning. That's about all the astronomy I've done in a month or so. Sad, really.

Friday, January 7, 2011

Ugh! Winter off to a poor start!

This area suffered moderate to heavy cloud cover for the December 10, 2010 total lunar eclipse. I'd been looking forward to it --even considered gearing up to produce a live webcast-- but we were disappointed in the end. I didn't even get out of bed to look out the window. Those who did take a peek largely saw clouds or got brief glimpses of the partial phases of the event.

I had to cancel the December Open Night at Stephens Memorial Observatory due to illness. I was suffering from a stomach "bug" and was well-advised to not stand out in the cold. Skies were mostly-cloudy that night so I hope nobody was very disappointed we did not open.

We're hoping 2011 brings good things for the Hiram observatory: we've a good chance of a construction site for a new observatory and there are plans afoot for a kick-off event in a funding drive! More on all of that later, as developments come.

The next Stephens Open Night is set for January 22 and we plan to show off the Great Orion Nebula. Skies this month have generally been cloudy and snow is currently in the forecast daily -- we'll make plans and see if Mother Nature cooperates!

Monday, November 15, 2010

Clouds didn't stop us

Last night (Nov. 13) we had "only" 15 people show up on a night when one could look at the sky and usually see no more than a cloud-shrouded Moon and an occasional glimpse of Jupiter. Yes, it was that bad. On a night when we shouldn't have even opened, an attendance of 15 is a surprise.

Still, the clouds thinned enough on occasion to allow decent views of the Moon and surprisingly good looks at Jupiter and the Galilean Moons. Jove's Southern Equatorial Belt was not visible though there are photographic signs from other sources of its impending return. At Stephens we were able to see traces of other cloud banding this and the last time we looked at that world (Oct. 9) and at no greater than 122X magnification. Again, given the conditions, the quality of the seeing was a surprise.

Clouds did close us a bit early but didn't stop us from seeing our two main targets for the night.

Sunday, October 10, 2010

Great Jupiter but no comet

Saturday night's (Oct. 9) Open Night at Stephens Memorial Observatory went pretty well. In all we had 28 visitors take a look at Jupiter, the Andromeda Galaxy, and the Perseid Double Cluster. I'd hoped and planned to view Comet Hartley 2 but could not find it to save my life! The skies improved as the night went on and by the time I closed, a little after 10:00, the Double Cluster was a naked eye object high over campus and the Milky Way was visible overhead. Our views of Jupiter were among the best I've enjoyed at Stephens. The Southern Equatorial Band is still missing, apparently obscured by high cirrus clouds in Jupiter's atmosphere. The northern band was easily seen but, more remarkable was the fact that we could make out numerous other, much more subtle, cloud bands in the northern and southern hemispheres. When we began the night's explorations, only three of the Galilean Moons were to be seen: three in a triangle on one side. After 9:00, however, Io put in an appearance albeit by itself on the opposite limb of the planet.It was a fine night at the observatory.

Sunday, September 19, 2010

Observe the Moon Night

Last night, September 18, was the first annual International Observe the Moon Night. The forecast for the night called for mostly-cloudy skies and that's what we were seeing in the early evening and when I headed to Stephens Memorial Observatory. I'd made an online posting stating that I would open the doors at 8:30 PM no matter the weather but if cloudy, would close at 9:00. Strange how things happen. As the appointed hour approached an opening in the clouds appeared overhead. At first the Moon was very hazy, then clear enough to offer fair views. I worked inside the dome preparing the big telescope for public use. By the time I opened the dome slit, the sky was completely clear of clouds! Over the course of the evening 33 visitors came and went and saw the waxing gibbous Moon and, later, Jupiter. The Moon put in a glorious appearance through the telescope's vintage low-power eyepiece. Jupiter, still minus its Southern Equatorial Band or cloud belt, was also seen in good detail: the Northern Equatorial band was visible and, better still, we got occasional glimpses of cloud bands in Jove's southern hemisphere. The four Galilean moons were also brightly present: three on one side, Io by itself on the other. Late in the evening clouds again intruded first covering the Moon, then Jupiter. Finally Jupiter would wink in and out of visibility as smaller and smaller openings in the clouds passed offering seconds-long glimpses of the beautiful distant scene. Jupiter was near its opposition this night at a distance of about 368 million miles. When told about the distance one woman exclaimed, "you can see 368 million miles with that?! {telescope} I closed the dome at about 10:45 when sprinkles were felt falling from the sky. The people were engaged and enthusiastic and the sights were quite wonderful. It was a good night.

Photo: Waxing gibbous Moon, two days after First Quarter. Photo by James Guilford

Sunday, August 29, 2010

A fine night out


After a long period of hazy, hot, humid, and cloudy weather we caught a break... last night's skies were predicted to be about as good as they ever get here. So I went out on an independent session to the astronomy club observing site near Spencer, Ohio -- something I have not done in far too long a time. Skies there are not as dark as they were a few years ago, but a paved parking lot, no street lights, and official permission for the activity made it acceptable.

I got a late start and had to forgo opportunities to enjoy and photograph a marvelous sunset over a broad valley. I did, however, arrive on site in time to use the fading twilight in setting up my equipment. As the last light faded the Milky Way emerged, visible from near the southern horizon to overhead and a bit beyond. Along the horizon were the summer constellations: Sagittarius and Scorpius. Saturn was sinking into the murk of the western horizon but I got a hazy glimpse of the ring world through another's telescope, already set up.

Due to not using my own telescope in some time, I suffered some difficulties in setup and alignment. I couldn't even find Polaris in the telescope mount's alignment optic and so "eyeballed" it. Surprisingly, the alignment was very good and for the rest of the night the scope was able to center or come close to all objects I asked its GoTo computer to find.

Though the sky was cloudless, it did suffer overall from light pollution or, perhaps, some lingering natural twilight. Viewing of a number of Messier objects was only fair. My old friends M81 and M82, which can be a lovely sight within the same eyepiece field of view, were barely discernible against the gray background sky. I did view, for the first time, M20 --the Trifid Nebula-- but observed no nebulosity, only the associated star cluster. The "Whirlpool Galaxy" (M51) could barely be seen at all though M31 --the Andromeda Galaxy-- put in an appearance looking, typically, like a cottonwood seed fluff.

I love refractor telescopes but frequent issue is that, when aimed straight up, the eyepiece can be uncomfortably low to the ground. So I happily got a nice view of the Ring Nebula (M57), which at that hour was high overhead, through the SCT of a companion.

In all, I viewed M11, M20, M22, M31, M51 (barely), M57, M81, M82, all in the space of a couple of hours. Then came the Moon.

As the waning gibbous Moon rose, its glow obscured the lovely path of the Milky Way and made it increasingly difficult to see any but the brightest deep sky objects. So I pointed my telescope towards Jupiter.

Jupiter emerged from behind the Sun earlier this year minus its dark southern equatorial cloud band or belt. I was eager to see. Though still low in the sky and rising at nearly the same altitude as the Moon, I was able to get a decent view of the planetary disk. Observed at several magnifications, with and without ND filter and sure enough, only one dark band was visible. I thought I could see hints of the Great Red Spot but, with the planet still low in the atmosphere, couldn't confirm that. I hope to get a better view of Jove next month but, at least, I got to see it!

I aimed the telescope at planet Uranus but that distant world was barely a dot in the eyepiece.

My project for the night was to attach my Canon EOS 50D digital SLR camera directly to my big Meade refractor -- using the 1,200mm optic as a telephoto lens. I'd never tried it before and it worked beautifully. There was some difficulty achieving sharp focus which was a surpise to me. Add to that the fact that I did not yet have a cable release for the camera and I was happy to get usable images at all. I did, however, get one very good shot out of the experiment (shown here) and will be ordering a cable release soon. That little device will help me minimize vibration -- I had to trigger the shutter by pressing the shutter release button by hand; an action that shook the entire telescope and did not help picture taking.

Packed up and left at about 11:15 a happy fellow.

Image: The Moon... both cursed and loved by amateur astronomers worldwide. It brought an early end to deep sky observing tonight but, itself, made a great subject for viewing and photographing. Canon EOS 50D: ISO 400, 1/400 sec., Meade achromatic f/8 refracting telescope: 1,219 mm. August 28, 2010, 10:54 PM. Photo by James Guilford.