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(IAAC) Obj: NGC 4631, NGC 4627 - Inst: 15 inch Obsession f4,5



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

Observer: Armin Hermann
Your skills: Advanced (many years)
Date/time of observation: 22 Feb 2004
Location of site: Sangkhlaburi, Thailand (Lat 15°N, Elev 200m)
Site classification: Exurban
Sky darkness: 5,5 mag <Limiting magnitude>
Seeing: 9 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 15 inch Obsession f4,5
Magnification: 342x
Filter(s): none
Object(s): NGC 4631, NGC 4627
Category: External galaxy.
Class: 
Constellation: CVn
Data: mag 9,2  size 15x3'
Position: RA :  DEC :
Description:
At 342x this enormous edge-on galaxy is spanning through the whole FOV (12’) of 
the 5mm Nagler!! Several knots are visible along this low-surface-brightness 
galaxy. The brightest knot appears as a 2’ long bar located just E of the 12mag 
star that’s located N of the galaxy’s center. Another bright knot (~1’ long) is 
visible S of the center. The W part of 4631 is extending out to a 14mag star 
and is thinner than and not as bright as the wider E part. One more knot is 
visible at the height of NGC4627.The E part is not extending as far from the 
center. It shows one 2’ long bar at the NE edge.The faint companion NGC 4627 
(12,4magv) appears as a 1’ long oval patch with no detail. At 342x it requires 
AV to be visible.
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