(IAAC) Obj: M 12 - Inst: 120 mm KONUS refractor,f/8.33, eq. mount

Natko Bajic natkobajic at yahoo.com
Fri Aug 6 08:04:03 EDT 2004


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 12
Category: Globular cluster
Class: VII
Constellation: Oph
Data: mag 6.6  size 14.5'
Position: RA 16h 47m  DEC -1° 57'
Description:
Beautiful globular cluster in Ophiuchus, seen easily
in finder, situated very near M 10. At 40x it seemed
slightly larger than its neighbour, although listed
angular size is smaller. View at 100x confirmed that,
it looked somewhat elongated to me. Cluster was
partially resolved, with about dozen outstanding stars
in brightness. In the brightness distribution it is
similar to M 10, with somewhat larger and fainter
core, but it is fading out in very similar way. Field
of view is filled with several brighter stars. Sketch
is available at the URL mentioned below.
--
Optional related URLs: http://natkobajic.netfirms.com



		
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