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(IAAC) Obj: Abell 33, PK238+34.1 - 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: Abell 33, PK238+34.1 - Inst: 15 inch Obsession f4,5
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From: apache@galaxy.atmob.org (Apache User)
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Date: Fri, 5 Mar 2004 10:40:56 -0500 (EST)
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Observation Poster: Armin Hermann <burmeseinn@yahoo.com>
Observer: Armin Hermann
Your skills: Advanced (many years)
Date/time of observation: 21 Feb 2004
Location of site: Sangkhlaburi, Thailand (Lat 15°N, Elev 200m)
Site classification: Exurban
Sky darkness: 5,5 <Limiting magnitude>
Seeing: 8 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 15 inch Obsession f4,5
Magnification: 78x and 244x
Filter(s): O III at 78x
Object(s): Abell 33, PK238+34.1
Category: Planetary nebula.
Class:
Constellation: Hya
Data: mag 12,4 v size 268"
Position: RA : DEC :
Description:
At 78x extremely faint even with the OIII filter. I could find the planetary
only with the help of a map and a sketch in the Night Sky Observer’s Guide. At
higher magnifications without OIII the object is not visible. At 78x the ring
structure is faintly visible. The outer edge of the ring fades away as the
inner part of the planetary is not completely dark. The nebula is located in a
star-pattern that resembles a Mercedes-star with the star in the center imposed
on the western edge of the ring. Those stars are of 12-13mag. Very difficult
object under less than ideal conditions.
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