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(IAAC) Obj: Abell 43 (PK 55+16.1) - Inst: 24" f/4.1 Ultralight Dobson



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Observation Poster: Stathis Kafalis <dobsonstathis@planet-interkom.de>

Observer: Stathis Kafalis
Your skills: Advanced (many years)
Date/time of observation: 2001 June 10
Location of site: 60 km south of Munich / Germany (Lat 48, Elev 750)
Site classification: Exurban
Sky darkness: 4-5 ( foggy horizon) <Bortle Scale (9 worst)>
Seeing: 5 <10-1 Seeing Scale (1 best)>
Moon presence: None - moon not in sky
Instrument: 24" f/4.1 Ultralight Dobson
Magnification: 168 and 280
Filter(s): OIII
Object(s): Abell 43 (PK 55+16.1)
Category: Planetary nebula.
Class: Smooth disk w. traces of ring structure
Constellation: Ophiuchus
Data: mag 14.6 (vis)  size 80x74"
Position: RA 17:53  DEC +10:37
Description:
At this bad transparency at 79x(32 mm WF) 3 stars in a small triangle embedded
in delicate faint diffuse glow. 
At 168x (15 mm Panoptic) with OIII filter a lelatively bright planetary of
~1-1.5' diameter. Round and mostly homogeneous, edge slighly brigther than center.
At 280x (9 mm Nagler) with OIII-filter patchy structure, wow! A dark wedge at 
the east edge penetrating into the center and may be another one from 
the south. Reminds me to the Trifid. 
Good contrast gain with OIII filter. 

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Optional related URLs: http://www.geocities.com/dobsonstathis
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