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(IAAC) Obj: NGC 6857 - 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 6857 - Inst: 15 inch Obsession f4,5
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From: anonymous@sedna.atmob.org
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Date: 15 Aug 2004 15:47:21 -0000
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Observation Poster: Armin Hermann <burmeseinn@yahoo.com>
Observer: Armin Hermann
Your skills: Advanced (many years)
Date/time of observation: 14 Aug 2004
Location of site: Sangkhlaburi, Thailand (Lat 15°N, Elev 200m)
Site classification: Exurban
Sky darkness: 5,5 <Limiting magnitude>
Seeing: 9 <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 6857
Category: Emission nebula.
Class:
Constellation: Cyg
Data: mag ~13mag size ~ 1'
Position: RA : DEC :
Description:
This small emission nebula is misclassified as a planetary nebula on Wil
Tirions Sky Atlas 2000. It does look like a planetary, though. AT 131x I could
easily find NGC6857 embedded inside a NW-SE elongated quartet of 4 stars of
magnitude 12,5 to 13,5. A faint 14mag central star is also visible within the
nebula. The CS is located at the NW edge of the faint nebula. The nebula itself
appears slightly oval (SW-NE) with a size of approx 30x40”. It looks like a
very open and short comet fading away towards its SE end. Difficult but
interesting object.
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