M 4, NGC 6121
Object: Globular Cluster
Constellation: Scorpius
Apparent Magnitude: 7.12
Est. Distance: 7200 ly
Telescope: Celestron CPC 800 (8")
Camera: Nikon D70 unmodified
Exposure: 1x30 sec (0.5 mins)
ISO: 1600
Date: 2nd June 2008
Annotated Version