James Janusz 2000 thru 2024 All Rights Reserved |
Telescope: Astro-Physics 160 EDF | Description:The Crescent Nebula (also known as NGC 6888, Caldwell 27, Sharpless 105) is an emission nebula in the constellation Cygnus, about 5000 light-years away from Earth. It was discovered by William 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. 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. (Wiki). |
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Mount: Astro-Physics AP1600 GTO | Constellation: Cygnus. |
Camera: ZWO ASI 6200 with Astronomic Filters | Remotely Imaged With CCD Commander. |
Guiding:SBIG ST402 Guider | Type: Emission Nebula |
Exposure Data: Ha,15, 10 minute sub-exposures. | Position: R.A. 20h 12m 07s Dec +38° 21' 03" |
Processed using Maxim data aquisition, PixInsight and PhotoShop image processing | Date: October 2023 |
Data Acquisiton, Reduction and Processing by Jim Janusz | Imaging Location: Maor Observatory at Whitetail Hollow |
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