Tuesday, May 11, 2010

La Posta Dinner with Late night Moonset - I

Date: Sept 26th 2009, Saturday
Observation Time: 8:30pm to 11pm (2.5hrs), 00:30am to 4:30am (4 hrs): Total 6.5 hrs.
Location: Jon's Home, Boulevard, CA
Weather: first session: moon 60% illuminated. Cloudy on SWS. Second session: moon set. No winds. No clouds. Excellent seeing and transparency. Best weather seen after a while.
Instruments: Jon's 16" dob (FL 1800mm with parracor), Jon's Celestron 100mm f/5 achromat. Didn't carry my 10" dob.
Buddies: Jon

While helping Jon in moving furniture, decided to also have a late night stargazing session once moon sets. didnt carry my 10" dob. Jon decided to keep 16" scope at blvd house only.

At 8:30pm, first quarter moon was pretty bright with 60% disk illuminated.

Jupiter: In refractor, clear view. The disk bands were visible. Achro color abberation was killing the image. Two moons on left while other two on right side. In 16" dob @ 9mm 200x awesome view. One of the best views. Two bands + the shade on remaining part of south was clearly visible. Also there was dark black spot exactly at the center on south. Not sure what it is.. but i have seen it before in last dark night observation. Jon also didn't know what it was.

M30: Way too faint in refractor. I realized that without the red-dot founder or telerad, hunting the objects are lil tricky. It does have 6x20 finder, but still I get confused with where its pointing. Just trying to understand the refractor. In the dob, with lil magnification, M30 it its specific shape visible. Not really a crispy clear image. Moonlite washed out the view.. Just no point watching any objects on S or W side.

M13: With dob, clearly resolved and shows how huge it is. Not the usual crispy image. shows clearly in refractor finder. Refractor low mag shows as nice GC similar to M22.

M27 Dumbbell: Jon pointed to this guy.. indeed crispy clear in 28mm UWAN @ 65x. shows the typical shape.

M52: To avoid moon, decided to stay on NE side, exactly opposite of moon. Jon pointed to this one, but "discovered" it. He wasn't sure what this faint lil OC is. cosndering the lcoation and the bright star next to cluster, it was indeed M52. With thig mag 120x on dob, it kills the cluster beauty. Better in low mags.

Mu Cephi (New): Wanted to browse all Cephus objects on this night, so started with Mu Cephi. Jon has never seen this before. Perfect Garnet-Red star. More the mags, more red color i can see. Means in refractor with 40x shows it as red-orangish star, while dob @ 120x shows it as big dark-red orangish star. Indeed an impressive object considering its history.

Iota Cassiopeia (New): don't remember too many details. Jon pointed to it. I remember watching two bright white stars very close to each other. I even tried the refractor, just don't remember what i saw.

At 9:30pm, Jon decided to take a nap for a while till moon sets. I continued..

NGC6939 OC - NGC 6946 Galaxy (New): OC in Cephus, while galaxy in Cygnus at the border. Indeed seemed like salt paper cluster. Individual stars are not that bright. but cluster seems to be rich, like small scale M46. CN small wonders also mentioned abt the galaxy 6946 near cephus-cygnus boundary but din't see it... again must have washed by moonlite.

Revisited this object again late night ~2am. Excellent cluster. In 28mm UWAN ~65x, can fit both cluser and galaxy in same view.. Galxy is indeed faint.. but definitely bigger in size.

M31-32-110: To test the moon effect on galaxies, pointed the refractor to M31. Not a great image.. Infact M32 and M110 wasn't that obvious either. So decided to give up on all fuzzies as well as tiny little objects till moon sets.

Alberio: Color of the pair seemed okay.. orange and bluish-white.

Double Double: Wasn't able to split individual pairs that clearly with 65x.

M103: Don't remember the shape. Clearly visible in the finder itself.

Continued..


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