M13
Messier 13 or M13 (also designated NGC) is a globular in the constellation of Hercules. It shines with over 100,000 stars at 25,000 light-years from Earth. This cropped image is a joint project of James Foster and me.
file: M13masC11-Color133min20128May24A-2a2sm.jpg

Photographic Data
telescope:
Celestron 11-inch (black tube) SCT with Starizona 0.7X reducer/flattener
FL= 1,955 mm

mount:
Astro-Physics 1200 GTO

guiding:
Off-axis with ZWO ASI120MM mini camera

imaging camera:
ZWO ASI6200MC-Pro color camera
(cropped image)

exposure:
133 minutes (2,2-hours)

photographic site:
James Foster observatory at Frazier Park California
(Bortle 4 at 5,500 ft elevstion)