(IAAC) Obj: NGC 6638 - Inst: 8" f/10 SCT fork mount


Observer: Jim Williams
Your skills: Advanced (many years)
Date/time of observation: 6-25-00   08:39 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: 100X, 324X
Filter(s): None
Object(s): NGC 6638
Category: Globular cluster.
Constellation: Sgr
Data: mag 9.2  size 5.0 (Tirion)
Position: RA 18:30.9  DEC -25:30
At 100X, this GC appears as a circular, unresolved glow about 
1.5' in diameter. It is slightly brighter toward the center.
Increasing the magnification to 324X, the cluster is still
not resolved, with no evidence of a core.
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