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> Open cluster NGC 7789 in Cassiopeia

Open cluster NGC 7789 in Cassiopeia

author: A.Ayiomamitis/Novapix

reference: a-aou77-89004

Image Size 300 DPI: 13 * 10 cm

The open cluster NGC 7789 in Cassiopeia is a bright and richly populated cluster comprised of approximately 300 member stars which are evenly distributed and well detached from the background sky. This cluster lies at a distance of 7620 light-years away with an apparent diameter of 25'. As indicated by the various red giants in the image, the cluster is advanced in age and which has been estimated to be approximately 1.6 billion years-old. NGC 7789 was discovered by Caroline Herschel in 1783.

Keywords for this photo:

2007 - ASTRONOMY - CASSIOPEIA - NGC 7789 - OPEN CLUSTER - RED GIANT - STAR - STAR CLUSTER -