Introduction | Map | Sketch | My Own Observations | References
On this page I collect my observations of the open star cluster M 103 in the constellation Cassiopeia.
To Stoyan's surprise, the open star cluster M 103 in the constellation Cassiopeia has made it into Messier's list as the only star cluster of the impressive stellar field in the Cassiopeia constellation (M 103, NGC 457, NGC 654, NGC 663).
Size: 6' (Stoyan)
Distance: 7,200 light years (Stoyan)
Rating: *** (Stoyan)
M 103, to the left of it NGC 654 and NGC 663, to the right of it NGC 457 (Owl Cluster). For orientation purposed, the Andromeda galaxy M 31 is included in the map, as well as the Perseus double cluster NGC 884/869 and avove it St 2, which, according to Stoyan, is a "must" for small telescopes.
Observed in France (Sumène, Haute Loire) at the beginning of October 2016 using the Heritage 100P in different magnifications - probably, it looked more like a small asterism, though...