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(IAAC) Obj: NGC 1851 - Inst: 15 inch Obsession f4,5



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Observation Poster: Armin Hermann <burmeseinn@yahoo.com>
Observer: Armin Hermann
Your skills: Advanced (many years)
Date/time of observation: 13 Jan 2004
Location of site: Sangkhlaburi, Thailand (Lat 15N, Elev 200m)
Site classification: Exurban
Sky darkness: 5,7 <Limiting magnitude>
Seeing: 9 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 15 inch Obsession f4,5
Magnification: 78x to 342x
Filter(s): None
Object(s): NGC 1851
Category: Globular cluster.
Class: II
Constellation: Col
Data: mag 7,2  size 11'
Position: 05:14:06 -40:02.8
Description:
Bright, very dense globular of about 8 diameter (at 342x). At 78x it resolves 
into few faint stars at its edge. At 244x the very dense and bright core is 
still not resolved into stars. The halo contains stars of 13mag and fainter. 
342x resolves the core partially and the globular fills more than half of the 
FOV (12). The eastern edge appears looser than the western side. Very 
beautiful!
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