M 57 The Ring Nebula

M 57 in HaO3LRGB

-Telescope: William Optics FLT 110 with F/T focuser 3025 & Starizona usb motor focus
-Mount: Skywatcher ΗEQ5 pro & EQ6 Skyscan pro
-Chip: Atik 314L+ at -5c
-Guiding: TS finder 8x50 with Meade DSI I pro
-Filter wheel: Starlight Xpress usb 7x1.25
-Location: Manor Obs(Ha & O3) & Mountain Kithaironas (LRGB)
-Luminance: 24x300sec 1x1bin
-Red: 12x300sec 1x1bin
-Green: 12x240sec 1x1bin
-Blue: 12x300sec 1x1bin
-Ha Astrodon 5nm :15x600sec -  1x1500sec - 4x1200sec
-O3 Astrodon 5nm : 12x300sec
-Total: 10hours and 05 min
-Programs I have used-
Maxim DL ,Pixinsight 1.6, Photoshop CS5, The Sky6 ,Focusmax

 

The Ring Nebula (also catalogued as Messier 57, M57 or NGC 6720) is a planetary nebula in the northern constellation of Lyra.^[5] Such objects are formed when a shell of ionized gas is expelled into the surrounding interstellar medium by a red giant star, which was passing through the last stage in its evolution before becoming a white dwarf.

This nebula was discovered by the French astronomer Antoine Darquier de Pellepoix in January 1779, who reported that it was "...as large as Jupiter and resembles a planet which is fading." Later the same month, fellow French astronomer Charles Messier independently found the same nebula while searching for comets. It was then entered into his catalogue as the 57th object. Messier and German-born astronomer William Herschel speculated that the nebula was formed by multiple faint stars that were unresolvable with his telescope.