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M 103 in Cassiopeia
On December the 16th I observed M103 in Cassiopeia with the 300mm f 5.3 dobson. This wonderful little cluster stands out well from the surrounding star field, and looks like a small Christmas tree. I counted 27+ stars in an area of 7’ diameter. There are many triangles and other asterisms visible in M103. This makes the sketching a lot easier. The sketch below was made using the 7mm Pentax. The faintest stars were added with the help of the 7mm Pentax. I could not detect any glow of unresolved stars, but I sometimes saw very faint stars popping in and out of view with using averted vision and a black cloak over my head.

image

Posted by Math on 12/18 at 11:21 PM
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