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The Crescent Nebula (NGC6888)
The Crescent Nebula is an emission nebula in the constellation Cygnus. It is about 4,700 light years away and is formed by a fast stellar wind from the star HD192163. The star is shedding its outer envelope, ejecting the equivalent of our Sun's mass every 10,000 years. The stellar wind is colliding with and energising, a 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 about 25 light years across. The central star will probably undergo a supernova explosion in the next million years. (Source: Sky Safari)
Taken with my William Optics FLT91 telescope with F6AIII 0.8x reducer, in my backyard at Bortle 5 skies.
Camera: ZWO ASI2600MC Pro with Optolong L-Ultimate 2" filter
Mount: ZWO AM5 with ASIAir Plus
Software: PixInsight, Affinity Photo2, NoiseXTerminator, StarXTerminator and BlurXTerminator
Integration time: 4h 10m
HOO version: flic.kr/p/2oKGQTQ
More acquisition details: astrob.in/8he66h/0/
The Crescent Nebula (NGC6888)
The Crescent Nebula is an emission nebula in the constellation Cygnus. It is about 4,700 light years away and is formed by a fast stellar wind from the star HD192163. The star is shedding its outer envelope, ejecting the equivalent of our Sun's mass every 10,000 years. The stellar wind is colliding with and energising, a 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 about 25 light years across. The central star will probably undergo a supernova explosion in the next million years. (Source: Sky Safari)
Taken with my William Optics FLT91 telescope with F6AIII 0.8x reducer, in my backyard at Bortle 5 skies.
Camera: ZWO ASI2600MC Pro with Optolong L-Ultimate 2" filter
Mount: ZWO AM5 with ASIAir Plus
Software: PixInsight, Affinity Photo2, NoiseXTerminator, StarXTerminator and BlurXTerminator
Integration time: 4h 10m
HOO version: flic.kr/p/2oKGQTQ
More acquisition details: astrob.in/8he66h/0/