(IAAC) Obj: Basel 4, Bas 4 - Inst: 15 inch Obsession f4,5

Observation Poster: Armin Hermann <burmeseinn@yahoo.com>
Observer: Armin Hermann
Your skills: Advanced (many years)
Date/time of observation: 03 Feb 2005
Location of site: Sangkhlaburi, Thailand (Lat 1509' N, Elev 200m)
Site classification: Exurban
Sky darkness: 5,0 <Limiting magnitude>
Seeing: 9 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 15 inch Obsession f4,5
Magnification: 131 and 342x
Filter(s): none
Object(s): Basel 4, Bas 4
Category: Open cluster.
Class: --
Constellation: Aur
Data: mag 9,1  size 5'
Position: RA :  DEC :
Very loose cluster that is barely visible against the background of the Milky 
Way at 131x. 342x magnification reveals some 15-20 stars of mag 12 and lower. 
The cluster is more obvious as such now. A few brighter stars are spread out 
N-S. The cluster's diameter is approx 5'.
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