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(IAAC) Obj: NGC 6553 - Inst: 15 inch Obsession f4,5
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To: Internet Amateur Astronomers Catalog <netastrocatalog@visualdeepsky.org>
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Subject: (IAAC) Obj: NGC 6553 - Inst: 15 inch Obsession f4,5
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From: anonymous@sedna.atmob.org
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Date: 4 Oct 2004 03:36:00 -0000
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Observation Poster: Armin Hermann <burmeseinn@yahoo.com>
Observer: Armin Hermann
Your skills: Advanced (many years)
Date/time of observation: 03 Oct 2004
Location of site: Sangkhlaburi, Thailand (Lat 15°N, Elev 200m)
Site classification: Exurban
Sky darkness: ~5 <Limiting magnitude>
Seeing: 7-8 <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): NGC 6553
Category: Globular cluster.
Class:
Constellation: Sgr
Data: mag 8,3magv size 8'
Position: RA : DEC :
Description:
At 131x magnification the cluster is just resolved into a few faint members at
the edge. A bright star (11mag) is located at the W-edge of the cluster.
342x shows a few more stars but the center remains unresolved, though it appears
granular. The diameter of 6553 is approx 5’. The GC does not brighten much
towards the center and looks like a little concentrated object.
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