Collinder 21 (Open cluster)
R/B-band color composite image from the Second Digitized Sky Survey (DSS2), measuring 30 arcminutes across.
Finder chart
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From Cambridge , Collinder 21 is visible in the evening sky, becoming accessible around 17:25 (EST), 56° above your eastern horizon, as dusk fades to darkness. It will then reach its highest point in the sky at 19:50, 74° above your southern horizon. It will continue to be observable until around 01:27, when it sinks below 21° above your western horizon.
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Name
Collinder 21
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Object type
Open cluster
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Visibility from Cambridge
All times shown in Cambridge local time.