(IAAC) Obj: NGC 2939, NGC 2940 - Inst: 10.1" f/4.5 Newtonian reflector

anonymous at sedna.atmob.org anonymous at sedna.atmob.org
Mon Sep 4 08:49:30 EDT 2006


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Observation Poster: Brent Reary <gmbreary at rollanet.org>

Observer: Brent Reary
Your skills: Intermediate (some years)
Date/time of observation: 04/27/06  02:55 UT
Location of site: Rolla, MO  USA (Lat 37 57'N, Elev )
Site classification: Rural
Sky darkness: 6.5 <Limiting magnitude>
Seeing: 6 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 10.1" f/4.5 Newtonian reflector
Magnification: 77x, 128x, 193x
Filter(s): None
Object(s): NGC 2939, NGC 2940
Category: External galaxy.
Class: 
Constellation: Leo
Data: mag   size 
Position: RA :  DEC :
Description:
NGC2939; Mag 12.4, Size 2.0' X 0.5', RA 09:38, DEC +09:31
A uniform oval halo elongated NW-SE.  It shows slight, gradual, diffuse
brightening toward the core.  Visible with averted vision at 77x, it was
best seen at 128x.  Three 10th magnitude field stars in an equilateral
triangle lie 9' to the NE.  NGC2940 is 5' N..

NGC2940; Mag 13.6, Size 0.5' X 0.5', RA 09:38, DEC +09:36
A small, faint, uniform round nebulous patch which shows no detectable
brightening toward the core.  Steadily visible with averted vision at 128x,
it began to fade into the background at 193x.

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