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M 57 expand

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.
Description Sources: Wikipedia, theskylive.com, in-the-sky.org
Equipment & Integration
Imaging telescope: Omegon 10" F/4 Astrograph
Imaging camera: ZWO ASI 533MC-P
Mount: Skywatcher HEQ-5 Pro Go-To
Guiding telescope: Omegon Microspeed 60mm
Guiding camera: ZWO ASI 715 MC
Coma corrector: TS GPU Superflat
Extras: ZWO EAF 5V Motor Focuser
Software: Adobe Photoshop 2020, DeepSkyStacker, PHD Guiding, PixInsight
Frames: 75s x 80 GAIN 100 @ 0 degrees
Integration: ~1.6 hours
Date captured: 28/09/2025
Location: Athens, Greece
Bortle Scale (?): 8