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M3 - Globular Cluster in Canes Venatici


From the author of   Sizing Up The Universe

Click here for Hertzsprung-Russell diagram.

Log stretch
M3

LogLog stretch
M3

04:18am EST Mar 12, 2007.
Starlight Express SXV-H9 on 10" RCOS at f/9.
L = 20 min (unguided 15-second subexposures).
Luminance data combined with L, R, G, and B from below.
Log/LogLog stretch, Unsharp mask, Gamma.


M3

23:48pm EDT May 20, 2006.
Starlight Express SXV-H9 on 10" RCOS at f/9.
L = 14.5 min, R = 2.5 min, G = 2.5 min, B = 2.5 min (unguided 15-second subexposures).
Log stretch, Unsharp mask, Gamma, Star Debloat.


M3

22:17pm EDT May 1, 2005.
Starlight Express SXV-H9 on 10" RCOS at f/9.
L = 3.3 min, R = 0.8 min, G = 0.7 min, B = 0.9 min (unguided 6-second subexposures).
Log stretch, Unsharp mask, Star Debloat.


Click for jpg

04:41am EST Feb 5, 2005.
Starlight Express SXV-H9 on 4" Tak FSQ refractor at f/5.
L = 9 min, R = 3 min, G = 3 min, B = 3 min (unguided 1-minute subexposures).
Richardson-Lucy deconv, Log stretch, artificial flat.

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