Globular cluster M22, NGC6656 in Sagittarius (SGR)

Bob Lockwood
Location of photo
Palomar Mountain, CA.
Date/Time of photo
RGB 20, 20, 20, 6x200sec ea. (bin 1x1) Telescope Engineering Company APO180FL @ f/7.36 using an Astro-Physics 160FF, F/L 1325mm Astro-Physics 1200 GTOCP3 FLI-MLx694 @-25c / FLI CFW2-7 / FLI-Atlas focuser / Guided by SBIG ST-I / w OAG. Astrodon Gen2 RGB MaxImDL 6.10, CCDStack, Photoshop CS5, Topaz Labs-clarity.
Image Field of view is 26 x 32.4 arcmin. M22 is an elliptical globular cluster in the constellation Sagittarius, near the Galactic bulge region. It is one of the brightest globulars that is visible in the night sky. M22 is also one of the nearer globular clusters to Earth at a distance of about 10,600 light-years away. It spans 32' on the sky which translates to a spatial diameter of 99 ± 9 light-years. 32 variable stars have been recorded in M22. (Wikipedia)
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