Globular Cluster
Taken by Giuseppe Doantiello on June 21, 2018 @
Oria, Italy
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Details:
Messier 22
ED 127 f/9 + IRCam V4
lucky imaging process 3600x5 sec
J2000 RA 18h 36m 23.94s Dec –23° 54′ 17.1″
Messier 22 (NGC 6656) is an elliptical globular cluster in Sagittarius, near the Galactic bulge region. It is one of the brightest globulars visible in the night sky and one of the nearer at a distance of about 10,600 light-years. It spans 32' on the sky which translates to a spatial real diameter of 99 ± 9 light-years.
It was one of the first globular clusters to be carefully studied first by Harlow Shapley in 1930.
M22 is very unusual in that it is one of only four globulars (the others being M15, NGC 6441 and Palomar 6) that are known to contain a planetary nebula.
Photographer's website:
http://https://www.flickr.com/photos/133259498@N05/
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