Ruud de Vries - Dutch Backyard Astrophotography

Fighting light pollution.....

NGC 6888, Crescent Nebula

NGC 6888, or the Crescent Nebula, is an emission nebula in the constellation Cygnus, about 5000 light-years away. It was discovered by Friedrich Wilhelm Herschel in 1792.
It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 (HD 192163) colliding with and energizing the slower moving wind ejected by the star when it became a red giant around 250,000 to 400,000 years ago.

NGC 6888, Crescent Nebula

Telescope
TS 90/600
Camera
Atik one 6.0
Mount
Skywatcher HEQ5
Flattener
TSFlat2,5
Guiding camera
Starlight Xpress Lodestar
OAG
TS 2" Off Axis Guider
Exposure
66 * 300sec Ha, 40 * 300sec OIII, 13 * 300sec RGB