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Messier 103
Messier 103 (also known as M103, or NGC 581) is an open cluster where a few hundred, mainly very faint, stars figure in Cassiopeia. It was discovered in 1781 by Charles Messier's friend and collaborator Pierre Méchain.Robert Bruce Thompson ''M103 (open cluster in Cassiopeia). Accessed online 13 April 2011 It is located between 8,000 to 9,500 light-years from the Solar System and ranging over about 15 light years. It holds about 40 certain-member stars, two of which have magnitudes 10.5, and a 10.8 red giant, which is the brightest within the cluster. A bright known foreground object is the star Struve 131, not a member of the cluster. The cluster may have 172 stars if including those down to 50% probability of a gravitational tie. M103 is about 22 million years old. Observation history After the discovery of Messier 101 through 103, Messier had no cause to carry out more detailed observations of these clusters and included them as an addition to his catalogue using the data o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
M103 Mazur
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