(IAAC) Obj: NGC 3642 - Inst: 10" f/4.5 Dobsonian

Observation Poster: Brent Reary <gmbreary@rollanet.org>
Observer: Brent Reary
Your skills: Intermediate (some years)
Date/time of observation: 03/03/03  03:00 UT
Location of site: Rolla, MO (Lat 37 57', Elev )
Site classification: Rural
Sky darkness:  <Limiting magnitude>
Seeing: 7 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 10" f/4.5 Dobsonian
Magnification: 36x, 68x, 72x, 136x
Filter(s): None
Object(s): NGC 3642
Category: External galaxy.
Constellation: UMa
Data: mag 11.1p  size 5.8' X 4.9'
Position: RA 11:22  DEC +59:05
Slightly elliptical with elongation almost E-W.  Very slight brightening
toward core with a uniform halo.  Located with averted vision at 68x.  Faint.
Does not magnify well.  Begins to fade into the background at higher 
magnificaion.  Best seen at 68x-72x.
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