M13 and M92 -- A Mosaic of Globular Cluster in Hercules
From the author of Sizing Up The Universe
Click here for M13's Hertzsprung-Russell diagram.
Click here for M92's Hertzsprung-Russell diagram.
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
M92:
21:21 EDT Jul 30, 2014.
Starlight Express SXV-H9 on 10" RC at f/9.
L = 63.3 min, R = 6.0 min, G = 6.0in, B= 6.0in
(unguided 20-second subexposures).
The mosaic was created and then processed as follows:
Richardson-Lucy deconv (2 iters), Log stretch, Unsharp mask.
The transparency and seeing were excellent on both nights but a little better on the M92 night.