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Messier 103
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Messier 103

March 31, 2003
Atlas Image Mosaic, covering 8.0´ × 12.0´ on the sky, of the open star cluster Messier 103 (NGC 581). The cluster is at a distance of about 2900 pc (9450 light years), behind a bit more than a magnitude of visual extinction, and formed about 16 million years ago. 2001 Jan 24-30


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