NGC6888
The Crescent Nebula is an emission nebula in the Cygnus constellation, about 5000 light years away. It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 colliding with and energizing the slower moving wind ejected by the star when it became a red giant around 400,000 years ago. The result of the collision is a shell and two shock waves, one moving outward and one moving inward. The inward moving shock wave heats the stellar wind to X-ray emitting temperatures.
Equipment: Exposure details: Location:
Telescope: TEC180FL
Mount: Astro Physics Mach1GTO
Camera: SBIG ST-10XME
Filters: Astrodon HaRGB
Ha: 5x20min
Red: 10x5min
Green: 10x5min
Blue: 10x5min
Chalkida, Euvoia, Greece
N 38o30'02'' - E 23o33'26''
Elevation:0m
17 June 2008
Image details:
Acquisition: MaxImDL Reduction/stacking: MaxImDL RGB weights: G2V Star
RGB combine: MaxImDL HaRGB creation: Photoshop CS3
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