NGC 6888- The Crescent Nebula

The Crescent Nebula is an emission nebula located in the constellation Cygnus and is about 5000 light-years away from Earth. It was formed by the fast stellar wind from the star WR 136 colliding with the slower moving wind ejected by the star when it became a red giant around 300,000 years ago. The collision created a shell and two shock waves, one moving outward and one moving inward. The shock wave that is moving inward has heated the stellar wind to X-ray-emitting temperatures.

Image acquisition and processing information:

Date: May 29th, 2022 (NGC 6888 RGB_LE)
Telescope: Celestron Edge HD 14" telescope using a Hyperstar v4 lens
Mount: Astro-Physics AP-1200 GTO CP3
Camera: ZWO ASI-2400 MC Pro one-shot-color camera
Image acquisition software: Sequence Generator Pro v. 3.0.3.169
Exposures: 179 one-minute exposures using an Optolong L-eNhance filter
Guiding: Telescope: AstroTech AT72ED, Camera: Starlight Xpress Trius Pro 814 CCD, Software: PhD2
Image processing Software: PixInsight v. 1.8.8.9

Date: June 20th, 2020 (NGC 6888 SHO and NGC 6888 Ha)
Telescope: Celestron Edge HD 14" telescope using a Hyperstar v3 lens
Mount: Celestron CGE Pro
Camera: ZWO ASI-183 MM Pro monochrome camera equipped with a Baader UFC 2" Filter Slider
Image acquisition software: Sequence Generator Pro v. 3.0.3.169

Exposures (for Narrowband SHO photo): 24 30-second exposures binned 2x2 using a Baader high speed narrow-band Ha filter, 22 30-second exposures binned 2x2 using a Baader high speed narrow-band OIII filter and 26 30-second exposures binned 2x2 using a Baader high speed narrow-band SII filter.

Exposures (for Narrowband Ha photo): 24 30-second exposures binned 2x2 using a Baader high speed narrow-band Ha filter.

Guiding: Telescope: AstroTech AT72ED, Camera: Starlight Xpress Trius Pro 814 CCD, Software: PhD2
Image processing Software: PixInsight v. 1.8.5