(IAAC) Obj: NGC 2506 - Inst: 15" f4.5 Obsession

[anonymous at s15272250.onlinehome-server.com]

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Observation Poster: Armin Hermann <burmeseinn at yahoo.com>

Observer: Armin Hermann
Your skills: Advanced (many years)
Date/time of observation: 23 Mar 2004
Location of site: Sangkhlaburi/Thailand (Lat +15, Elev 200m)
Site classification: Exurban
Sky darkness: 5.0 <Limiting magnitude>
Seeing: 7 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 15"  f4.5  Obsession
Magnification: 131x
Filter(s): none
Object(s): NGC 2506
Category: Open cluster.
Class: 
Constellation: Mon
Data: mag 7.6  size 7'
Position: RA 08:00  DEC -11:
Description:
At 131x the cluster  is not fully resolved. Approx 10 brighter 11mag-stars are 
imposed on 50+ fainter stars in an area of 6’. The distribution of stars in the 
center is weaker than at the edge which makes the cluster look ring-shaped. The 
background of the cluster is filled with the milky glow of fainter unresolved stars. 
Very dense and nice. 

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