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(IAAC) Obj: Abell 20 (PK 214+7.1) - Inst: 24" f/4.1 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 Oct 19
Location of site: German Alps (Lat 48°, Elev 1300 m)
Site classification: Exurban
Sky darkness: 3 (good transparency, fine structured Milky Way) <Bortle Scale (9 worst)>
Seeing: 3 <10-1 Seeing Scale (1 best)>
Moon presence: None - moon not in sky
Instrument: 24" f/4.1 Dobson
Magnification: 168 and 360
Filter(s): OIII
Object(s): Abell 20 = PK 214+7.1
Category: Planetary nebula.
Class: Smooth disk w. traces of ring structure
Constellation: Canis Minor
Data: mag 14.3 (vis) size 64"
Position: RA 07:23 DEC +01:46
Description:
At 168x (15 mm Panoptic) and OIII- filter immediately and easy to see as
a faint round relatively large disk with a merely fainter middle.
Edge quite good defined. Seen also at 360 (7 mm Nagler) without filter
as a faint diffuse glow with ill defined edge.
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Optional related URLs: http://www.geocities.com/dobsonstathis
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