Open Cluster M103 in Cassiopea

Galactic star cluster with at least 40 stars at a distance of 8000 light years. Diameter is 6.5' or about 15 light years. Note red giant in center and blue giants around edge.

Images taken with TEC-140 Telescope mounted on Losmandy G11 mount. Camera used was a Canon EOS20D used at prime focus.

Three 1 minutes exposures dark compensated, aligned and stacked, background removed and Digitaly Developed in ImagesPlus 2.01