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M13 - The Great Globular Cluster in Hercules


From the author of   Sizing Up The Universe

Click here for Hertzsprung-Russell diagram.

Brighter
M13

Less Bright
M13

23:36 EDT Jul 20, 2014.
Starlight Express SXV-H9 on 10" RC at f/9.
L = 66 min (199 twenty-second images), R = 6 min, G = 6 min, B = 6 min
Richardson-Lucy deconv (2 iters), Log stretch, Unsharp mask.

M13

23:36 EDT Jul 20, 2014.
Starlight Express SXV-H9 on 10" RC at f/9.
L = 10 min (best 30 out of 199 twenty-second images), R = 6 min, G = 6 min, B = 6 min
Log, Unsharp Mask.


More Contrast

M13

Less Contrast

M13

21:42 EDT Jul 30, 2009.
Starlight Express SXV-H9 on 10" RC at f/9.
L = 25.3 min, R = 6 min, G = 6 min, B = 12 min
Log, Unsharp Mask.


M13

21:42 EDT Jul 30, 2009.
Starlight Express SXV-H9 on 10" RC at f/9.
L = 12 min, R = 6 min, G = 6 min, B = 12 min (guided 2-minute subexposures).
Log, Unsharp Mask.


Subdued

M13

Bright

M13

01:52 EDT Jun 1, 2005.
Starlight Express SXV-H9 on 10" RC at f/9.
L = 10 min, R = 1.6 min, G = 1.6 min, B = 1.6 min (mostly unguided 12-second subexposures).
Log Log stretch, Unsharp Mask.


M13

21:30 EDT Aug 9, 2004.
Starlight Express SXV-H9 on 4" Tak FSQ refractor at f/5.
L = 15 min, R = 10 min, G = 10 min, B = 10 min (unguided 1-minute subexposures).
LogLog, Unsharp Mask.


M13

23:42 EDT Aug 7, 2004.
Starlight Express SXV-H9 on 4" Tak FSQ refractor at f/5.
10 x 1 min unguided exposures.
Artificial Flat, LogLog, Unsharp Mask.


M13

00:30 EDT May 29, 2004.
Starlight Express SXV-H9 on 4" TMB refractor at f/8.
13 x 1 min unguided exposures.
Log, Unsharp Mask, Artificial Flat, Gamma.


Multiresolution composite of 10"RC image with 4" FSQ image.
Click on image for a much larger version (371kB).
M13

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