NGC6888 Stack 1332frames 5328s WithDisplayStretch

Crescent Nebula
NGC6888
The Crescent Nebula 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.
It is a rather faint object located about 2 degrees SW of Sadr. For most telescopes it requires a UHC or OIII filter to see. Under favorable circumstances a telescope as small as 8 cm (with filter) can see its nebulosity. Larger telescopes (20 cm or more) reveal the crescent or a Euro sign shape which makes some to call it the "Euro sign nebula"
Above Infos with thanks from wikipedia

• Telescope: Nerone - Skywatcher 200 PDS, 1000 mm, 8", f/5
• Mount: Skywatcher AZ-EQ5 - AltAz
• Rotator: Pegasus Falcon
• Camera: ZWO ASI 294MC
• Total time: 5,328 s | Frames: 1332 | 4s | Gain: 300
• Cutout: 4144 x 2822 pixel
• Darks: None
• Flats: None
• Sharpcap Hotpixel Removal | Gradient Removal
• Optic: Baader Coma Corrector Mark-III
• Filter: AltAir Quad-Band V2
• Date: 2023-10-13 | Time: 22:51 UTC | Outdoor: 15 °C