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M 57

The Ring Nebula (also catalogued as Messier 57, M 57 or NGC 6720) is a planetary nebula in the northern constellation of Lyra. Such objects are formed when a shell of ionized gas is expelled into the surrounding interstellar medium by a star in the last stages of its evolution before becoming a white dwarf. It has a apparent magnitude of 8.8 while the whole disk has the size of 1.5' x 1' (arcminutes). Below you can find a cropped and zoomed image.

Imaging telescope: TS Photon 8" F5 Newtonian reflector
Imaging camera: ZWO ASI 533MC-P
Mount: Skywatcher HEQ-5 Pro Go-To
Guiding telescope: TS 80/600 F7.5 Achromat
Guiding camera: ZWO ASI 120MC-S
Coma corrector: TS GPU Superflat
Extras: -

Software: Adobe Photoshop 2020, DeepSkyStacker, PHD Guiding, PixInsight
Frames: 120s x 90 GAIN 100 @ 0 degrees
Integration: 3 hours
Date captured: 09/11/2020
Location: Athens, Greece
Bortle Scale (?): 8