(IAAC) Obj: M 10 - Inst: 120 mm KONUS refractor,f/8.33, eq. mount

Observer: Natko Bajic
Your skills: Intermediate (some years)
Date/time of observation: 11. July 2001.
Location of site: Vinisce, near Split, Croatia (Lat
44.5, Elev 10 m)
Site classification: Rural
Sky darkness: 5.5 <Limiting magnitude>
Seeing: <I-V Seeing Scale (I best)>
Moon presence: None - moon not in sky
Instrument: 120 mm KONUS refractor, f/8.33, equatorial
Magnification: 40x, 100x
Filter(s): None
Object(s): M 10
Category: Globular cluster
Class: VII
Constellation: Oph
Data: mag 6.6  size 15.1'
Position: RA 16h 57m  DEC -4 6'
Beautiful globular cluster in Ophiucus, seen easily in
finder. Situated very close to its rival M 12, a
rather similar globular cluster. Not completely
resolved at 40x, because of notable central
condensation, but at 100x it was almost completely 
resolved, with five notably brighter stars than other.
It was perfectly round, unlike its neighbour, with
much brighter core gradually fading out. There were
many stars scattered in its field of view, few of them
somewhat brighter. Sketch is available at the URL
mentioned below.
Optional related URLs: http://natkobajic.netfirms.com
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