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(IAAC) Obj: M107 - 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 12, 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: Minor - crescent or far from object
Instrument: 10-inch, f/4.5, Dobsonian
Magnification: 44x, 118x, and 178x
Filter(s): None
Object(s): M107
Category: Globular cluster.
Class: Faint
Constellation: Ophiuchus
Data: mag 7.9 size 13'
Position: RA 16:33 DEC -13:03
Description:
This cluster some 21,000 light-years away is very faint and I almost missed it. I could not even see any detail at 178x. At 44x M107 is a glowing object but I could see three distinct stars at the directions of northwest, south-southwest, and south-east. There is also two stars in a line on the opposite side of the cluster from these 3 stars that make a right triangle. With these five stars of nearly same magnitude they form an arrow with M107 in the middle.
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