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M22 in Sagittarius , 





    
        

            AlBroxton
M22 in Sagittarius

M22 in Sagittarius

Technical card

Imaging telescope or lens:Celestron C11 Celestron

Imaging camera:40D Canon

Mount:CGEM Celestron

Guiding telescope or lens:80mm EON Orion

Focal reducer:6.3 reducer Celestron

Software:photoshopDeep Sky Stacker

Resolution: 750x686

Astrometry.net job: 2327027

RA center: 256.654 degrees

DEC center: 37.887 degrees

Pixel scale: 1.834 arcsec/pixel

Orientation: 64.393 degrees

Field radius: 0.259 degrees

Description

Messier 22 (also known as M22 or NGC 6656) 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 was one of the first globulars to be discovered in 1665 by Abraham Ihle and it was included in Charles Messier's catalog of comet-like objects on June 5, 1764. It was one of the first globular clusters to be carefully studied first by Harlow Shapley in 1930. He discovered roughly 70,000 stars and found it had a dense core. Then Halton Arp and William G. Melbourne continued studies in 1959. Because of the large color spread of its red giant branch (RGB) sequence, which is similar to that observed in Omega Centauri, it became the object of intense scrutiny starting in 1977 with James E. Hesser et al.

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AlBroxton
AlBroxton
License: None (All rights reserved)
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M22 in Sagittarius , 





    
        

            AlBroxton