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Obj: M 108 - Inst: 15 inch Obsession f4,5
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To: Internet Amateur Astronomers Catalog <netastrocatalog@visualdeepsky.org>
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Subject: Obj: M 108 - Inst: 15 inch Obsession f4,5
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From: anonymous@sedna.atmob.org
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Date: 12 May 2004 15:44:02 -0000
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Observation Poster: Armin Hermann <burmeseinn@yahoo.com>
Observer: Armin Hermann
Your skills: Advanced (many years)
Date/time of observation: 12 May 2004
Location of site: Sangkhlaburi, Thailand (Lat 15°N, Elev 200m)
Site classification: Exurban
Sky darkness: ~6 <Limiting magnitude>
Seeing: 8-9 <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): M 108
Category: External galaxy.
Class:
Constellation: UMa
Data: mag 10,5 size 8,8x2'
Position: RA : DEC :
Description:
At 244x I could see several features within the approx 2’x8’ long bright
galaxy. The most obvious detail is a 1’ long, oval patch towards the W edge of
M108. This cloud appears bright and is easily visible. More subtle is another
elongated patch in the galaxy’s center. Between that patch and the western
cloud is a dark irregular rift that winds further along the southern side of M108. I
could see 3 stars embedded in M108, the brightest one (~13mag) near the center
and two fainter stars (~14,5mag) E and further NE of the center. Just N of the
center near the brightest foreground star I could see another faint star or
star-like cloud in M108. That one only with AV and with difficulty. Though not
as bright as M82, M108 is as spectacular and rich in detail as M82.
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