The galaxy cluster Abell 21
Red-band image from the Second Digitized Sky Survey (DSS2), measuring 30 arcminutes across.
Finder chart
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Click to enlarge.
From Ashburn , Abell 21 is not observable – it will reach its highest point in the sky during daytime and is no higher than 12° above the horizon at dawn.
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Name
Abell 21
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Object Type
Galaxy Cluster
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