M22 in Sagittarius , 



    
        

            AlBroxton

M22 in Sagittarius

Technical card

Imaging telescopes or lenses: Celestron C11 Celestron

Imaging cameras: 40D Canon

Mounts: CGEM Celestron

Guiding telescopes or lenses: 80mm EON Orion

Focal reducers: 6.3 reducer Celestron

Software: Deep Sky Stacker  ·  photoshop


Dates:July 11, 2018

Frames: 11x70"

Integration: 0.2 hours

Avg. Moon age: 27.64 days

Avg. Moon phase: 4.01%


Basic astrometry details

Astrometry.net job: 3292448


Resolution: 600x623

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
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M22 in Sagittarius , 



    
        

            AlBroxton