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Messier 52, Open Cluster in Cassiopeia

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Messier 52 is a rich open cluster of some 200 stars covering an area about 1/3 the size of the full Moon. A few of its stars can be seen with binoculars, but the best view is through a telescope at low power, where the cluster will stand out nicely from the Milky Way background. The cluster is about 20 light years in diameter and about 4600 light years away.
Evening visibility: July-February
Best viewed with: telescope
  Printable chart (pdf) View larger image
Find the constellation Cassiopeia, which has a distinctive "W" shape (although its orientation changes at different times of year as it circles the north celestial pole). On fall evenings, look for Cassiopeia in the northeast, where its tilt makes it look like a "3", and in the winter look high in the north above Polaris, where it is oriented like an "M".

Once you have located Cassiopeia, note that the last two stars of the W shape point directly to Messier 52. Extend a line from these two stars that is just slightly longer than the distance between them. There are no other bright stars to guide the way, but if you get lost, notice that there is one 5th magnitude star just north of M52 and another just south of it (see the arrows in the chart below), and these should be easily visible in binoculars or a finderscope. In between them, you should find M52.
Star charts created with Cartes du Ciel