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Uploaded 11-Apr-19
Taken 11-Apr-19
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Dimensions3718 x 2559
Original file size12.5 MB
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Color spaceUncalibrated
Messier 3

Messier 3

Astrophotography targets "come around' annually as they are optimally positioned. This is my second crack at M3, a globular cluster about 14 million ly away in Canes Venatici. Last time I used an unmodified Nikon D90. This year (April 1, 2019), I managed far better resolution with steady seeing and a ZWO ASI183MM camera, shooting at .52 arc seconds/pixel. In fact, I was able to resolve stars right across the face of the cluster. This is 85 minutes of LRGB, 40 flats and library darks, with a 5 " ES127ED apo refractor. Processed in Pixinsight.