(IAAC) Obj: M25 (IC4725) - Inst: 8" f/10 SCT fork mount


Observer: Jim Williams
Your skills: Advanced (many years)
Date/time of observation: 6-25-00   08:23 UT
Location of site: Stockton, Ca (Lat 38^0 N, Elev 20')
Site classification: Suburban
Sky darkness: 6.0 <Limiting magnitude>
Seeing: 8 <1-10 Seeing Scale (10 best)>
Moon presence: None - moon not in sky
Instrument: 8" f/10 SCT fork mount
Magnification: 50X, 
Filter(s): None
Object(s): M25  (IC4725)
Category: Open cluster.
Constellation: Sgr
Data: mag 4.6  size 32' (Tirion)
Position: RA 18:31.6  DEC -19:05
At 50X, this OC is very loose, consisting of 5 or 6 8th magnitude
stars. Most members are magnitude 10 and below. M25 almost fills 
a 45' field of view eyepiece. There is only a slight central 
concentration of stars.  
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