(IAAC) Obj: m103, NGC 581 - Inst: 10" F/5.6 Dobsonian

anonymous at sedna.atmob.org anonymous at sedna.atmob.org
Tue Nov 16 00:22:12 EST 2004


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Observation Poster: Brian Carter <Nairbretrac at hotmail.com>

Observer: Brian Carter
Your skills: Intermediate (some years)
Date/time of observation: 11/14/2004
Location of site: Charlie Elliot (Lat , Elev )
Site classification: Exurban
Sky darkness: 5.0 <Limiting magnitude>
Seeing: 6 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 10" F/5.6 Dobsonian
Magnification: 64x  109x   203x   284x
Filter(s): 
Object(s): m103, NGC 581
Category: Open cluster.
Class: Cl, pL, B, R, Ri
Constellation: Cas
Data: mag 7.4  size 6
Position: RA 1:33.2  DEC +60:42
Description:
I have passed over this cluster so many times, never really knew what it was. 
The only other time I knew I had seen m103 was with a GOTO 70mm, and it was 
durring a marathon.  Anyway....  There are five main stars forming a triangle
and many other faint stars peppering the field.  Looks like a faint nebulosity
filling in the triangle, but they are just faint stars, some resolved, some not.
The five main stars are great because of their contrasting colors.  For each far
angle of the triangle, the stars are yellow.  The two bright ones in the middle,
maybe magnitude 9?, resemble a much fainter and closer Albiero, same pretty 
blue and yellow/orange.  Very very nice.  Worth resting at.
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