Monday, August 13, 2007

Perseid meteors fizzle

The weekend's Perseid meteor shower was a bit of a bust for me. I didn't have much ambition and the sky conditions were rather hazy with a few passing clouds. Not great inspiration for staying up til all hours to watch for "falling stars." I stepped outside a few times Friday, Saturday, and Sunday nights and bagged about six meteor sightings but wasn't inspired to head to darker skies. Tonight, however, was a beautiful night! The humidity and haze were down, it was nicely cool, and the sky was cloudless. I stepped outdoors at about 10:30, binoculars in hand, and decided to take a look around. The light-polluted sky was clear enough to display a good number of stars, Jupiter, with Antares nearby, shown brightly to the south, and, OH! a single bright meteor streaked north to south as I gazed skyward! Later I believe I spotted a very faint meteor headed in the same direction. Checking out the northeast sky with the binoculars and yes!, I was able to find the Andromeda Galaxy (M31) with no trouble at all so we've got a shot at showing it off at the next observatory open house. In the binocular field of view the galaxy was a faint fuzz-ball, rather indistinct in the bright skyglow, but it was there! I was too tired to go to the club meeting tonight and too tired to haul myself out to actually observe. The sky, however, is a wonder to behold no matter how you behold it!

Saturday, July 28, 2007

July open night -- Jupiter rules!

Tonight was a scheduled open house at the SMO. The weather (cloud cover) was extremely doubtful but there was enough clear sky that I felt I had to make the drive out and open the dome. Good thing I did! All told about 12 visitors stopped by over the evening with the last leaving after 11 PM -- they were the same two ladies who showed up as my first visitors at about 9:30! We had surprisingly good views of Jupiter considering sky conditions but a long wait for the Moon to climb out from behind the neighbor's trees. Cloud bands were fairly easy to pick out on the planetary disk. The four Galilean moons were also easy to see and point out to guests. No neutral-density filter necessary. When Luna finally rose high enough we had to wait for breaks in the clouds -- most people seemed to think the wait was worth it. Views at around 100X weren't very special --soft details, probably the atmosphere-- so I switched to a low-power, fist-sized antique eyepiece and the entire view was changed. We could see the entire nearly-full Moon in the field of view with good detail overall and excellent seeing at the terminator. Even thin clouds scudding across the lunar disk seemed to add, rather than detract. So not too bad a night. My Moon photo (below) apparently was published in Ravenna's Record-Courier newspaper... I've gotta try and get a copy!

Saturday, July 21, 2007

19th and 2st Centuries meet

I went to Stephens Observatory and was able to use the 2-inch adapter to mount my Canon Digital Rebel XT camera to the century-old Warner and Swasey telescope with its 9-inch Brashear objective. All of the photos are a bit softer than I'd like but not surprising but two were fairly good. Quality suffered in part because of trees surrounding the site, the photos were all made in bright twilight. And the atmosphere was unsteady. I was at the limit of inward motion on the eyepiece holder so I couldn't experiment with focus. Still, this first success pleases me and I can hardly wait to try again under better conditions! Moon images were all made between about 8:40 and 8:45 PM when Luna moved behind high trees to the south-southwest of the dome. Didn't try Jupiter because it just didn't look good enough -- details barely distinguishable by eye. I did learn, however, that placing a neutral density filter at the eyepiece improved the quality of Jupiter's appearance to the point where, instead of a brilliant blank disk, I could visually make out the two major cloud bands. I took a long break and then went into my continuing efforts to learn aiming the telescope by celestial coordinates. I believe I succeeded in finding M22 by this method but had trouble with other objects. So there is a lot of work remaining. Spotted M9 with binoculars though dim objects were hard to spot this night. Saw one fast-moving satellite in the telescope's field of view. Surprising and delightful was seeing the Milky Way span the sky nearly overhead -- a wonderful way to end the evening (really the night) at about midnight. Came home and had to view my photographic efforts and that kept me up til about 2:00 AM. My favorite image is seen here. There's chromic aberration at the edge of the lunar disk but it isn't bad considering the optics of this 9-inch achromatic doublet are 107 or so years old -- uncoated and no filters! I sent a copy of this photo to a local newspaper to see if they'll use it and give us a bit of added publicity.

Monday, July 2, 2007

Solar photo experiment

At Chaunticlair this afternoon I experimented with my AstroZap Baader solar filter and coupling of my Canon Digital Rebel XT to the Meade 390 telescope. I had cobbled together pieces of at least two different camera adapters to come up with a short one that would fit the Canon to the 1.25-inch eyepiece holder of the telescope. The combination focussed easily but the images were a bit disappointing. I had hoped and expected (based on the Cooley Telescope experience) that I would see sunspot and granulation but didn't see any granulation at all! Visually the sunspot showed good detail --today Sunspot 961 was nearly dead-center on the Sun-- but didn't image well (1/1,000th second @ ISO 400). I'll keep trying! Tonight I used the 390 and took a look at the pairing of planets Venus and Saturn in the twilight sky. With the 32mm (about 31X) eyepiece I was just able to fit both planets in the same field of view and got a very nice look at Venus in crescent phase -- the best I've seen it-- with Saturn tiny but distinct. The twilight actually helped by controlling the contrast of brilliant Venus. Swung the telescope around and got a nice look at Jupiter, as well, viewed through openings between the trees here at home. At the end of the brief evening clouds began moving in as I attempted photographs of the Meade 390 pointing towards Venus and Saturn in the fading twilight. The image didn't turn out as well as one I had seen and was imitating but it isn't bad, either.

Wednesday, June 27, 2007

Camp Asbury visits observatory

This morning Stephens Observatory hosted a group of 18 from a local church camp, vising as part of a "Space Week" program. Despite the hazy, hot, and humid conditions, seeing was surprisingly good. I pointed the grand old 9-inch scope, with its nice new Baader solar filter in place, at the sun and shared the view. We had a nice spidery little sunspot (designated Sunspot 961) to look at and could also make out granulation in the solar atmosphere. (View similar to the SOHO photo at right but in white light, not orange.) I'd never seen granulation with my own eyes and enjoyed the experience as much as or more than did the kids ... though they certainly were an enthusiastic and bright group. Just before I left I learned a respected previous Observatory director, J.R. Andress, had sneaked in for a personal visit to see what I've been up to. He left a note in the Observatory log to that effect and that he liked what he saw; also leaving his contact info.

Saturday, June 16, 2007

Open: Alumni Day and night

The sky had a thin covering of milky clouds all day. Still, I had announced a daytime SMO open house and nighttime stargazing session for Hiram College Alumni Day and I had to honor my commitment. The daytime, solar viewing session didn't do much. We had 12 visitors between 9 AM and Noon and we didn't look at the Sun -- the clouds made for an indistinct solar disk and the Sun itself was a blank showing no sunspots at all. Visitors, however, did seem to enjoy seeing the telescope and talking about it and the Observatory. The adult daughter of former Observatory director J.R. Andress stopped by with her dog and recollected spending many pleasant girlhood nights under the dome with her father. Time passed quickly. I closed up and headed home. The evening saw a somewhat thinner cloud layer. It was, however, in evidence. I headed to the Observatory knowing that people would see stars overhead and wonder why we weren't open for the evening if I didn't show up. I knew that whatever we might look at would run the risk of being quite unimpressive. As darkness fell more and more stars appeared but, as expected, close examination with telescope and binoculars revealed the filtering effect of those, now invisible, high clouds. Would anyone actually show up? Then the people started arriving. The Observatory dome was full of visitors before Jupiter rose above the trees. Still they waited patiently and expectantly as the bright planet inched its way into visibility. The view was not very distinct but, with patience, we could just make out Jupiter's two major cloud bands. The Galilean moons shown like golden stars in a pattern to the left of the planet. By the time the evening finished --with a man and his two young daughters, all on bicycles at 11 PM-- we had entertained 36 nighttime visitors between 9:30 and 11:00 PM. Even though Jupiter was all we could view on this night of murky skies, our guests left apparently happy and impressed. People do still love the starry realm and it's a pleasure to share it with them.

Tuesday, June 12, 2007

A good night to look at the stars

It was a good night to get out and look at the stars. I've not been at Stephens Memorial Observatory (SMO) for quite some time and have missed two excellent nights. Last night's sky conditions weren't as good as Saturday and Sunday night's but I wasn't up to going out. It's been a physically and emotionally draining week. I packed my observing kit into the car and took off for the dark(er) skies of Portage County. It's nearing summer solstice so twilight seems to go on forever. With trees tall around the observatory Jupiter, which rose before sunset, didn't clear the trees until a little after 10:00 PM. Seeing wasn't the best for that big, brilliant planet, but I could make out some of the colored bands of Jupiter's atmosphere. I went fishing for a couple of galaxies but never found them; I still have much to learn about aiming the big telescope! After a while I went back to Jupiter and, unfortunately, sky conditions weren't quite as good as earlier. In the mean time Scorpius had risen above the trees and, using red Antares as a guide, found the beautiful globular star cluster M4, 5,600 light years distant. In the eyepiece the cluster looked elongated vertically and not so densely packed as most of the globulars I've seen; I liked it all the more for that! I attached a digital camera to the century-old telescope and tried to image Jupiter but still am not happy with the results. Eyepiece projection produces soft images (maybe due to poor physical coupling) and the adapter is too long for prime-focus. I'll have to work on better coupling of the camera to the telescope and buy a short coupler. Closed up and left at about 11:30 PM with a sore neck (from looking up) but feeling refreshed. A last look back at the observatory building silhouetted against a very starry sky brought a smile to my face. A most excellent way to end the day!