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(IAAC) Obj: PNG 189.8+7.7 (M 1-7, PK189+7.1) - 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: PNG 189.8+7.7 (M 1-7, PK189+7.1) - Inst: 15 inch Obsession f4,5
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From: anonymous@sedna.atmob.org
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Date: 12 Nov 2004 05:01:44 -0000
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Observation Poster: Armin Hermann <burmeseinn@yahoo.com>
Observer: Armin Hermann
Your skills: Advanced (many years)
Date/time of observation: 10 Nov 2004
Location of site: Sangkhlaburi, Thailand (Lat 15°N, Elev 200m)
Site classification: Exurban
Sky darkness: 5,4 <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): PNG 189.8+7.7 (M 1-7, PK189+7.1)
Category: Planetary nebula.
Class: 2
Constellation: Gem
Data: mag 13 magv size 37" (?)
Position: RA: 06:37:21, Dec: +24:00
Description:
At 342x this planetary looks slightly elongated. I estimated the size to
approx 10x15" which is much smaller than the given size in Uranometria. I
saw a round central part that is brightening towards the middle. This
fairly bright center is surrounded by a faint elongated (NW-SE) halo that
seems to fade away. Bluish color is obvious at 131x but the color is no
more visible at 342x. At 131x the nebula looks just non-stellar.
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