(IAAC) Obj: NGC 3184 - Inst: 15 inch Obsession f4,5

[anonymous at sedna.atmob.org]

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

Observer: Armin Hermann
Your skills: Advanced (many years)
Date/time of observation: 22 May 2004
Location of site: Sangkhlaburi, Thailand (Lat 15°N, Elev 200m)
Site classification: Exurban
Sky darkness: ~5,5mag <Limiting magnitude>
Seeing: 9 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 15 inch Obsession f4,5
Magnification: 244x
Filter(s): 
Object(s): NGC 3184
Category: External galaxy.
Class: SAB
Constellation: UMa
Data: mag 9,8v  size 7,5'
Position: RA :  DEC :
Description:
At 244x this face-on galaxy appears with a total diameter of approx 4’. The 
N edge does reach a prominent 11,5mag star. The core is very small and the 
nucleus appears stellar and faint. The halo has an extremely low surface 
brightness but with averted vision I could make out traces of the spiral 
structure. The SW spiral arm is best visible. The NE arm, though much wider, 
looks more like a slightly brighter irregular patch of nebulosity between the 
galaxy’s core and the 11,5mag star. Difficult object that requires very clear 
skies.

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