About the image: All data was collected by me, from my back yard in upstate New York USA. I acquired the data using NINA with PHD2 for guiding. The skies were smoky due to the wildfires in Canada. Telescope used was the iOptron RC8 and the ZWO ASI 1600mm camera with RGB filters. I inspected, calibrated, and stacked the data using Astropixel Processor, and processed the image in Pixinsight. In Pixinsight I used dynamic crop, dynamic background extraction, photometric color calibration, TGV Denoise, and HDR Multiscale Transform with pixelmath.
About M92:
With an apparent magnitude of 6.3, M92 is one of the brightest globular clusters in the Milky Way and is visible to the naked eye under good observing conditions. It can be most easily spotted during the month of July. The cluster is very tightly packed with stars, containing roughly 330,000 stars in total. [1]
It was discovered by Johann Elert Bode on December 27, 1777, then published in the Jahrbuch during 1779. It was inadvertently rediscovered by Charles Messier on March 18, 1781, and added as the 92nd entry in his catalogue. William Herschel first resolved individual stars in 1783. It is also one of the galaxy's oldest clusters. Its true diameter is 109 ly, and may have a mass corresponding to 330,000 suns.[2]
[1]
https://www.nasa.gov/feature/goddard/2017/messier-92[2]
https://en.wikipedia.org/wiki/Messier_92
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