Herschel 338
NGC 6520
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Object Type
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Open Cluster
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Constellation
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Sagittarius
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Magnitude
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7.6
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Size
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5.0' x 5.0'
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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 6520.
Scattered group of both bright and faint stars. Brighter stars in circular pattern with a bright orange star in the centre.
18" f/5 newtonian. 16mm nagler eyepiece. 143x.
Sky View observatory. Zenith limiting magnitude 6.7.