(IAAC) Obj: NGC 2440 - Inst: 15" f4.5 Obsession

[anonymous at s15272250.onlinehome-server.com]

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Observation Poster: Armin Hermann <burmeseinn at yahoo.com>

Observer: Armin Hermann
Your skills: Advanced (many years)
Date/time of observation: 30 Dec 2003
Location of site: Sangkhlaburi/Thailand (Lat +15, Elev 200m)
Site classification: Exurban
Sky darkness: 5.2 <Limiting magnitude>
Seeing: 9 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 15"  f4.5  Obsession
Magnification: 78 - 342x
Filter(s): none
Object(s): NGC 2440
Category: Planetary nebula.
Class: 
Constellation: Pup
Data: mag 9.1  size 54 x 20"
Position: RA 07:42  DEC -18:
Description:
At 78x very bright featureless oval disk of intense blue color. 342x still shows very 
strong blue (more intense than 2392!). An inner, open ring extending E-W is now 
visible. The center appears dark. The inner part is surrounded by an outer shell 
that is fainter and oval and tilted to the inner ring by some 60°, extending SW-NE. 
Ring and shell are blue. Very bright and rich in detail. No central star visible.

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