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Messier 11 - The Wild Duck Cluster

Description of object:

M 11 is a compact open cluster in the constellation Scutum (the Shield). It contains some 2900 stars in a distance of 6300 lightyears. D The diameter of the bright inner part of the cluster is about 10 arcminutes, corresponding to an absolute diameter of 18 lightyears. The distribution if main sequence stars shows that the whole cluster is about three times bigger in diameter, approximately as large as the Moon in the sky. The Age of M 11 is about 250 million years, so it is an "intermediate age" cluster.
More information can be found in a paper from Sung et al.
« Click here to load a large image for comparison the size of Messier 11 with the full moon.

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