Tom Pickett: The Crescent Nebula NGC 6888, Caldwell 27

Tom Pickett is an American astro-photographer. He is the founder of the Face Book Astronomy Club. 

Hi Everyone... I hope you atr having a good day….

I was finally able to finish this image last night. The clouds moved out and the Moon was out of the way until 2:00 AM last night. I love this image and there is so much H-Alpha in this region of the sky.smile emoticon:-) I hope all of you like it.

Have a good day and clear skies.

Details

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 Friedrich Wilhelm 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[citation needed] 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 favourable 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".

Equipment Details

Camera: Canon EOS T2i/550D Modified And TEC Cooled At 5C
  Scope: Takahashi FS-60Q At 600mm F10
  Exposure: 6 Minutes Each
  ISO: 1600
  Number of Stacked Images: 76
  Number of Dark Frames: 0
  Number of Bias Frames: 0
  Filters: Baader UV/IR cut filter
  Mount: Takahashi EM-200 Temma 2
  Guide Scope: Non
  Stacking Software: DeepSkyStacker
  Processing Software: Photoshop CS6 And Adobe Camera Raw
  Shooting Date/Time 06/06/2017 01:29 AM
  Shooting Date/Time 06/17/2017 12:01 AM