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M52 = NGC7654 (23h 24.2m +61°35´, 6.9 mag. ) This rich open star cluster in Cassiopeia was discovered by Messier on Sept. 7, 1774. Located more than 3,000 ly away, it measures over 10 ly across and cosists of some 200 stars.
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In addition to M52 and NGC 7789, Cassiopeia hosts several other open star clusters that are visible to night through your binoculars. Here are some others to tempt you outside.
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M52 ( NGC 7654) is an open cluster of about 120 stars. It's found 6º NW of rho Cas. Burnham gives the best method of finding the cluster: draw a line from alpha Cas to beta Cas, then continue this line, doubling its length.
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Triple star iota Cas Variable star rho Cas Diffuse Nebulae I 1805, I 1848, I 59, NGC 281 Planetary Nebula NGC 7635 Open star clusters: M52, M103, NGC 663, NGC 129, NGC 133, NGC 146, NGC 457, NGC 559, NGC 654, NGC 663 ...
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See also: Cluster, Cassiopeia, Sky, Star, Clusters
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