(IAAC) Obj: PK290.5+7.9, FG 1 - Inst: 15" Obsession f4,5

anonymous at sedna.atmob.org anonymous at sedna.atmob.org
Tue Jun 19 08:50:56 EDT 2007


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

Observer: Armin Hermann
Your skills: Advanced (many years)
Date/time of observation: 16 04 07
Location of site: Sangkhlaburi, Thailand (Lat +15, Elev 200m)
Site classification: Rural
Sky darkness: 9 <1-10 Scale (10 best)>
Seeing: 8 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 15" Obsession f4,5
Magnification: 342x
Filter(s): O III
Object(s): PK290.5+7.9, FG 1
Category: Planetary nebula.
Class: 
Constellation: Cen
Data: mag 11.4  size 49"
Position: RA 11h:29m  DEC -53:
Description:
Modestly bright disk without color of ~25" diameter at 342x. The edge is fading
away but otherwise the disk shows uniform brightness, maybe with a hint of a
brighter W-edge. The central star is easily visible at 342x. Interestingly
there is no CS mentioned in the Uranometria description. Observation with OIII
does not improve visiblility of the object but rather makes it a more
difficult target! Interesting object. It would also be interesting, if other
observers were able to see the CS.

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