M103 (NGC 1912)
A young, bright, remote open cluster
in the constellation Cassiopeiae. It was discovered
by Pierre Méchain in 1781. M103 has an estimated
age of 20 million years. Most of its stars are hot and blue. However, close
to the center of the cluster is a bright star (type M6 III, mag 10.8) that
has evolved to the red giant stage. In
binoculars, M103 is easy to find and appears as a nebulous fan-shaped patch.
|M103. Image credit: NOAO/AURA/NSF
||8,000 light-years (2,400 pc)
||R.A. 01h 33.4m,
Dec. +60° 39'
|C 0129+604, OCISM 75,
AND STAR CLUSTERS