Open cluster Messier 103 (M103, NGC 581) is one of the "latest additions" (together with M101 and 102) to his catalog, which Charles Messier included from Pierre Méchain's report, but had no occasion and no time to observe before publication. M103 is one of the more remote open clusters in Messier's catalog, at about 8,000 light years.
Found in the constellation Cassiopeia, the cluster M103 is aged around 20 million years and is a fascinating object to photograph. You can see in the middle an orange star - this is a pretty amazing red giant star.
Stack of 20 images @ 20sec - DBK21AU04.AS Date taken: 05.10.2013
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