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(IAAC) Obj: M81, NGC 3031 - Inst: 16" Newtonian, f/4.45, truss-dob
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Observation Poster: Don Clouse <dlcdeepsky@insightbb.com>
Observer: Don Clouse
Your skills: Intermediate (some years)
Date/time of observation: June 21, 2003, 12:10am EDT
Location of site: south central IN, USA (Lat 38d 16m, Elev 785 ft.)
Site classification: Rural
Sky darkness: 7 <1-10 Scale (10 best)>
Seeing: 6 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 16" Newtonian, f/4.45, truss-dob
Magnification: 145x
Filter(s): none
Object(s): M81, NGC 3031
Category: External galaxy.
Class: SA(s)ab
Constellation: UMa
Data: mag 7.9 (B) size 27.1'x14.2'
Position: RA 09:56 DEC +69:04
Description:
At 145x (12.5mm Ultima, 21' true field) M81 was quite large, bright, and
elongated 7'x4' aligned north/south. A bright, concentrated core is surrounded
by an even glow which fades evenly and and gradually to the edge. Hints of a
dark lane were occaisionally visible in the southwest to west part of the
galaxy.
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