(IAAC) Obj: NGC 6231 - Inst: 15" f/4.5 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 Jun 2008
Location of site: Khao Poon Hill, 7 km S of Kanchanaburi, Thailand (Lat 14 N, Elev 200m)
Site classification: Exurban
Sky darkness: 6mag <Limiting magnitude>
Seeing: 8-9 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 15" f/4.5 Obsession
Magnification: 342x, 131x
Filter(s): 
Object(s): NGC 6231
Category: Open cluster.
Class: 
Constellation: Sco
Data: mag 2.6  size 14'
Position: RA 16:54  DEC -42:
Description:
Magnificient! One dozen very bright stars are scattered among over 100 more 
members in that cluster. At 131x the cluster appears approx 12' wide and is of 
unique brilliance. Many of the stars show beautiful colors. Its amazing that 
this OC has the same absolute brightness as Omega Centauri (-10.3mag)!

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