NGC 103

NGC 103 is a small, open star cluster located in the constellation Cassiopeia. It was discovered by John Herschel on October 5, 1829. The cluster is approximately 6,100 light-years away from Earth and estimated to be about 14 million years old, making it a relatively young cluster. It contains a small number of stars, around 40, distributed across an area roughly 5 arcminutes in diameter. The brightest stars in NGC 103 are of magnitude 10.

Due to its small size and relative faintness, NGC 103 is best observed through binoculars or a small telescope under dark sky conditions. It appears as a slightly concentrated group of stars against the rich background of the Milky Way.

While not as prominent as other open clusters in Cassiopeia, such as M52 or M103, NGC 103 is still a worthwhile object for amateur astronomers to observe. Its compact nature and relatively young age make it an interesting subject for study. Determining the exact number of stars within the cluster and its age remains a focus of ongoing astronomical research.