Hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  Crescent Nebula  ·  LBN 203  ·  NGC 6888  ·  Sh2-105

Image of the day 10/08/2021

Getting plate-solving status, please wait...
    NGC 6888, 



    
        

            Rocco Sung
    Powered byPixInsight

    NGC 6888

    Image of the day 10/08/2021

    Getting plate-solving status, please wait...
      NGC 6888, 



    
        

            Rocco Sung
      Powered byPixInsight

      NGC 6888

      Imaging telescopes or lenses: Planewave CDK 17"

      Imaging cameras: Apogee U16M

      Mounts: Software Bisque Paramount ME

      Filters: Astrodon OIII  ·  Astrodon HA  ·  Astrodon Luminance


      Frames:
      Astrodon HA: 10x3600" (10h) bin 1x1
      Astrodon Luminance: 8x1200" (2h 40') bin 1x1
      Astrodon OIII: 21x1200" (7h) bin 1x1

      Integration: 19h 40'


      RA center: 20h12m08s.913

      DEC center: +38°2040.91

      Pixel scale: 0.631 arcsec/pixel

      Orientation: -100.893 degrees

      Field radius: 0.461 degrees

      WCS transformation: thin plate spline

      More info:Open 


      Resolution: 3719x3719

      Data source: Amateur hosting facility

      Remote source: Sierra Remote Observatories

      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[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.

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      NGC 6888, 



    
        

            Rocco Sung