Abell cluster 21 (Galaxy 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 , Abell cluster 21 is not observable – it will reach its highest point in the sky during daytime and is no higher than 7° above the horizon at dawn.
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Name
Abell cluster 21
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Object type
Galaxy cluster
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Visibility from Cambridge
All times shown in Cambridge local time.