M 103, NGC 581
Object: Open Cluster
Constellation: Cassiopeia
Apparent Magnitude: 7.4
Est. Distance: 8500 ly
Telescope: Celestron CPC 800 (8")
Camera: Nikon D70 unmodified
Exposure: 1x30 sec (0.5 mins)
ISO: 1600
Date: 2nd June 2008
Wikipedia link
Annotated Version