Herschel 351
NGC 6638
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Object Type
|
Globular Cluster
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|
Constellation
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Sagittarius
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Magnitude
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9.2
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Size
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7.3' x 7.3'
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Combination of 5, 3 minute images unfiltered.
SBIG STL-1001E CCD. 20" f/6.8 Dall-Kirkham cassegrain telescope at prime focus.
Visual Observation Notes:- NGC 6638.
Moderately large. Moderately bright. Slight hint of resolution. Very low in the south in city glow.
18" f/5 newtonian. 16mm nagler eyepiece. 143x.
Sky View observatory. Zenith limiting magnitude 6.7.