An image of the Double Cluster and the large open cluster St 2. Two smaller open clusters are also framed: NGC 957 and NGC 743.
Date: December 14, 2009
Constellations: Perseus and Cassiopeia
Location: Joshua Tree National Park, California
Optics: Borg 77EDII at f/4.3 on Vixen SX Sphinx Mount
Camera: Hutech modified Canon EOS 5D Mark II
Exposure: 20 RAW light frames of 120 seconds, ISO 800
Processing: Light frames calibrated with 40 dark frames and 25 flat frames in ImagesPlus. Background neutralized, light frames combined using MinMax Excluded.