Messier 3 in Canes Venatici
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2012-03-23+25
Gahberg observatory, Upper Austria
6” Lichtenknecker Flatfieldcamera Atik 16HR + Baader LRGB-filters
Alt AD6
Luminance 20x3 min / RGB 4x3 min each
1h 36min
Globular cluster
18’
+6.2 mag
Canes Venatici
33588 light years
discovered by Charles Messier 1764
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