(IAAC) Obj: IC 1454 (Abell 81) - Inst: 17.5" f/4.5 Dobson

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• Subject: (IAAC) Obj: IC 1454 (Abell 81) - Inst: 17.5" f/4.5 Dobson
• From: apache@atmob.org (Apache User)
• Date: Fri, 2 Nov 2001 05:31:44 -0500 (EST)
• Cc: dobsonstathis@planet-interkom.de
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Observation Poster: Stathis Kafalis <dobsonstathis@planet-interkom.de>

Observer: Stathis Kafalis
Your skills: Advanced (many years)
Date/time of observation: 2000 Aug 23
Location of site: Austrian Alps (Lat 47°, Elev 2600)
Site classification: Rural
Sky darkness: 1-2 (extremly dood transparency) <Bortle Scale (9 worst)>
Seeing: 5 <10-1 Seeing Scale (1 best)>
Moon presence: None - moon not in sky
Instrument: 17.5" f/4.5 Dobson
Magnification: 83 and 413
Filter(s): UHC and OIII
Object(s): IC 1454 (Abell 81)
Category: Planetary nebula.
Class: Ring structure
Constellation: Cepheus
Data: mag 13.8 (vis)  size 33"
Position: RA 22:43  DEC +80:27
Description:
At 83x (24 mm WF) without filter immediately found next to 2 stars of 14mag.
At 413x (4.8 mm Nagler)without filter exactly round with small hole in 
the middle and slightly diffuse edge. Looks like a diffraction pattern of 
an extrafocal star. 
More contrast with UHC and even more with OIII, but no mare details.
--
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