M2 - Globular Cluster in Aquarius
From the author of Sizing Up The Universe
22:17 EDT Oct 5, 2016
Starlight Express Trius-SX694 on 10" RC at f/9.
20-second unguided exposures.
R best 16, G best 16, B best 17 out of 21.
Log stretch, (mild) unsharp mask, color saturation boosted.
Click here for blinking RR-Lyrae stars.
22:32 EDT September 5, 2015.
Starlight Express SXV-H9 on 10" RCOS at f/9.
L = 23(30), R = 20(24), G = 19(24), B = 18(24)
unguided 20-second subexposure.
Log stretch, unsharp mask.
22:48 EDT September 18, 2013.
Starlight Express SXV-H9 on 10" RCOS at f/9.
L = 26 min, R = G = B = 4 min
(unguided 15-second subexposures).
Log stretch, unsharp mask.
NOTE: Full moon just 28 degrees to the east.