Messier 92 (NGC 6341)
The M92 globular cluster in the constellation Hercules is not as impressive as its neighbor M13, but it is still a great object. The core is bright and very compact and surrounded by an outer core.
Image taken June 20, 2006 at 05:33 UT at Louisville, CO with Celestron Nexstar11 on AptAstro wedge, Meade F3.3 focal reducer, and Astrovid Stellacam II video camera at 128 integration (4.25 sec), medium gamma, 9/14 gain. Weather was party cloudy, temperature 68°F, transparency good, no wind. 10 min video was dark subtracted, flat field and bias corrected, aligned and stacked with Registax3.