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(IAAC) Obj: M10 - Inst: 10-inch, f/4.5, Dobsonian
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Observation Poster: Mitchell Diers <deltacassopeiae@hotmail.com>
Observer: Mitchell Diers
Your skills: Intermediate (some years)
Date/time of observation: June 8, 2002 End of Evening Astronomical Twilight and Midnight
Location of site: Turlock, CA (Lat 120deg.50min, Elev 167 ft.)
Site classification: Urban
Sky darkness: 8 <1-10 Scale (10 best)>
Seeing: 8 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 10-inch, f/4.5, Dobsonian
Magnification: 44x, 118x, and 178x
Filter(s): None
Object(s): M10
Category: Globular cluster.
Class:
Constellation: Ophiuchus
Data: mag 7 size 8'
Position: RA 16:55 DEC 04:02
Description:
At 44x I could see the brightest stars in the cluster looking off to the side of the cluster. It showed a great amount of detail but could not see patterns in this cluster as with M12. At 118x there were many more dim stars even using direct vision. I could also see that M10 had a much brighter surface brightness than M12. At 178x I could see more dim stars near the center of the star cluster and also see some star patterns as well.
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