(IAAC) Obj: NGC 6818 - 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: 27 Jun 2008
Location of site: 5 km N of Kanchanaburi, Thailand (Lat 14 N, Elev 50m)
Site classification: Exurban
Sky darkness: 5.5 <Limiting magnitude>
Seeing: 9 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 15" f4.5 Obsession
Magnification: 131x, 342x
Filter(s): 
Object(s): NGC 6818
Category: Planetary nebula.
Class: 
Constellation: Sgr
Data: mag 9.3  size 17"
Position: RA 19 :44  DEC -14:
Description:
Very beautiful blue, round disk at 131x. At 342x the color is not as obvious 
anymore but, some details are now apparent in the nebula. The area of the 
center and just W of the center is slightly darker which gives 6818 the 
appearance of a subtle ring. There is also a gap visible at the N edge of the 
disk. The E edge seems to be brighter and wider than the W edge. Those details 
appear more pronounced through the OIII filter.

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