M103 (NGC581)
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Type Location r.a. dec. Size Magnitude Distance
Open Cluster Cas 01h33.2 60°42' 5' 7.4 8.5 kly

25 stars starting from mag 11. Real diameter of about 16 light years. I suspect the yellow stars to not be part of the cluster.

Date Telescope Binning Exp Time (s) Special processing Notes
11/06/2003 Centurion
18"
L 1:1
RGB 3:1
L 3x300
R,G,B 300
LRGB, DDP