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(IAAC) Obj: NGC 1491 - 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 1491 - Inst: 15 inch Obsession f4,5
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From: anonymous@sedna.atmob.org
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Date: 19 Nov 2004 09:51:19 -0000
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Observation Poster: Armin Hermann <burmeseinn@yahoo.com>
Observer: Armin Hermann
Your skills: Advanced (many years)
Date/time of observation: 18-19 Nov 2004
Location of site: Sangkhlaburi, Thailand (Lat 15°09' N, Elev 200m)
Site classification: Exurban
Sky darkness: 6,2 <Limiting magnitude>
Seeing: 9+ <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 15 inch Obsession f4,5
Magnification: 131x
Filter(s): O III
Object(s): NGC 1491
Category: Emission nebula.
Class:
Constellation: Per
Data: mag -- size 7x5'
Position: RA : DEC :
Description:
Bright, small galactic nebula located just W of an 8,5mag star. The nebula
responds very well to the OIII filter and shows a lot of detail at 131x
magnification. The overall shape of NGC 1491 might be described as triangular
but with the OIII a dark N-S lane that bisects the nebula into 2 long streaks
can be seen. Observed with AV, very faint patches of NGC 1491 extend across the
8mag star and a bit further east. The before mentioned bright streaks are
approx. 6-7' long.
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