(IAAC) Obj: NGC 6451 - 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: 24 06 08
Location of site: Khao Poon Hill, 7km from Kanchanaburi, Thailand (Lat 14 N, Elev 200)
Site classification: Exurban
Sky darkness: 5.6 - 6 changing <Limiting magnitude>
Seeing: 9 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 15" f/4.5 Obsession
Magnification: 131x, 342x
Filter(s): 
Object(s): NGC 6451
Category: Open cluster.
Class: 
Constellation: Sco
Data: mag 8.2  size 8'
Position: RA 17:51  DEC -30:
Description:
Nice and rich cluster of approx 9' diameter. At 131x around 40 stars are 
visible, distributed in a ring around an empty area east of the center. At 
342x some 50 stars between 10 and 14.5mag are visible.

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