The Ring Nebula (also catalogued as Messier 57, M57 and NGC 6720) is a planetary nebula in the northern constellation of Lyra. Such a nebula is formed when a star, during the last stages of its evolution before becoming a white dwarf, expels a vast luminous envelope of ionized gas into the surrounding interstellar space. This nebula was discovered by the French astronomer Charles Messier in 1779.
We used two telescopes for imaging this nebula combining short and long exposures. The goal was to bring out maximum details in the center while showing the extremely faint Ha shells.
Technical details :
Luminance : 9000×1″(2h30) + 180×15″(45min) + 600×60″(10h) / RGB : around 160×60’’ per filter / Ha : 278×300″ (23h10) / Total : 44h24min
With Newton customized Orion 14″, Zwo ASI290MM Pro and Zwo ASI1600MC Pro on EQ8 and Telescope Newton 250 f/4 Axis instruments / Corrector Televue Paracorr 2 / Filters: Antlia V-pro 36mm / Camera: ZWO ASI2600MM Pro / Mount: AP1100 / Location : AstroARO Observatory, Portugal
First set of data – September 2019 / Last set of data – July 8, 2023
Softwares : Nina / APP / Siril / Photoshop