(IAAC) Obj: NGC 3158, NGC 3159, NGC 3161, NGC 3163 - 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: 14 Feb 2004
Location of site: Sangkhlaburi/Thailand (Lat +15, Elev 200m)
Site classification: Exurban
Sky darkness: 5.0 <Limiting magnitude>
Seeing: 5 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 15"  f4.5  Obsession
Magnification: 131 - 342x
Filter(s): none
Object(s): NGC 3158, NGC 3159, NGC 3161, NGC 3163
Category: Group of galaxies.
Class: 
Constellation: LMi
Data: mag 11.9  size 2' x 2'
Position: RA 10:14  DEC +39:
Description:
I could find and identify only 4 members of the Gx cluster around NGC3158. This 
brightest (11.9) member is quite an easy target and was visible at 131x. It 
appeared 
round with a slightly brighter nucleus and a faint halo extending about 1’. North of 
3158 I saw NGC3159, 3161, 3163 (13,5-14magv) at 342x. Each galaxy was very 
difficult even with averted vision under the poor conditions of that night. None did 
show any detail such as a core or elongated shape at 342x. They all appeared as 
faint tiny spots of light barely visible against the hazy sky. Good conditions should 
reveal more members of the NGC3158-group.

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