(IAAC) Obj: Abell-24 - Inst: 20" f4.2 dobsonian telescope

[anonymous at sedna.atmob.org]

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Observation Poster: Nick Martin <drnjmartin at fastmail.fm>

Observer: Nick Martin
Your skills: Intermediate (some years)
Date/time of observation: 
Location of site: Drongan , Ayrshire, Scotland,UK (Lat 57, Elev 420 ft)
Site classification: Exurban
Sky darkness: 5.8 <Limiting magnitude>
Seeing: 5 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 20"  f4.2 dobsonian telescope
Magnification: X200
Filter(s): UHC
Object(s): Abell-24
Category: Planetary nebula.
Class: 
Constellation: Canis Major
Data: mag 13.6  size 265 "
Position: RA 07:52  DEC 03:00
Description:
A very faint and difficult nebula found with the aid of small field chart in 
Megastar. 
It lies at the end of a line of stars with a dog leg at the north end of the 
line. The planetary just follows the dog leg and precedes a east west oriented 
couple of stars.
Barely detectable unfiltered the nebula was still difficult using a UHC 
filter. It required averted vision and tube wobbling to perceive and was only 
rarely seen clearly. The nebula appeared cylindrical and the north-south 
dimmer region dividing the nebulosity was observed (without prior knowledge of 
its existence). A darker site would probably afford better views of this 
interesting but challenging nebula.
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