M92 – to center or not to center

Messier 92 (also known as NGC 6341) is a globular cluster of stars in the northern constellation of Hercules. It was discovered by Johann Bode in 1777. The cluster was independently rediscovered by Charles Messier on March 18, 1781 and added as the 92nd entry in his catalogue. M92 is at a distance of about 26,700 light-years away from Earth. M92 is one of the brighter globular clusters in the northern hemisphere, but it is often overlooked because of its proximity to the even more spectacular Messier 13. M92 has a much denser core and is more difficult to resolve than M13.

I deliberately choose to put this globular cluster not in the middle of the frame, as there are so many interesting things to see right next to it, mainly much more distant galaxies. To illustrate this I created an inverted, annotated version. Please check the full resolution version to appreciate it to its fullest 🙂

Messier 92

Telescope: 16″ f3.75 Dream Scope
Camera: FLI ML16803
Mount: ASA DDM85
Exposure: 3.5 hours (26x300s L +  3x5x300s RGB)
Date: May 2018
Location: Southern Alps, France


Annotated, inverted version of the previous image

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