Celestial hemisphere:  Northern  ·  Constellation: Gemini (Gem)  ·  Contains:  10 Gem  ·  11 Gem  ·  12 Gem  ·  13 mu. Gem  ·  7 eta Gem  ·  IC 443  ·  IC 444  ·  Part of the constellation Gemini (Gem)  ·  Sh2-248  ·  Sh2-249  ·  Tejat Posterior  ·  Tejat Prior  ·  The star Propus (ηGem)  ·  The star μGem

Image of the day 03/12/2019

Getting plate-solving status, please wait...
    Jellyfish Nebula IC443 mosaic, 



    
        

            Barry Wilson
    Powered byPixInsight

    Jellyfish Nebula IC443 mosaic

    Image of the day 03/12/2019

    Getting plate-solving status, please wait...
      Jellyfish Nebula IC443 mosaic, 



    
        

            Barry Wilson
      Powered byPixInsight

      Jellyfish Nebula IC443 mosaic

      Acquisition details

      Dates:
      March 2, 2019
      Frames:
      Astrodon 5nm Ha: 43×1200(14h 20′) bin 1×1
      Astrodon 5nm Olll: 42×1200(14h) bin 1×1
      Astrodon 5nm SII: 42×1200(14h) bin 1×1
      Integration:
      42h 20′
      Avg. Moon age:
      25.82 days
      Avg. Moon phase:
      14.81%

      RA center: 06h19m29s.10

      DEC center: +22°4639.4

      Pixel scale: 2.097 arcsec/pixel

      Orientation: 88.996 degrees

      Field radius: 1.591 degrees

      More info:Open 

      Resolution: 3220x4411

      File size: 7.4 MB

      Locations: Entre Encinas y Estrellas E-EyE, Fregenal de la Sierra, Extremadura, Spain

      Data source: Own remote observatory

      Remote source: e-EyE Extremadura

      Description

      A two pane mosaic of this supernova remnant and it spectacular shells of expanding gases and its associated emission nebula Sharpless 249. This is the second process, however initially I chose a classic Hubble Pallete with its orange-yellow hues. It was a great image but I felt I wanted more of a contrast between all of the interacting gases across the frame.

      After some experimentation I modified the Blue channel mapping (Ha x OIII)xOIII and after some Colour Mask work I ended with the Jellyfish itself rendered with a redder hue that gave a marked contrast to Sh249 and also revealed the structure of the narrow neck of accelerating remnant gases. Of course processing Mu and Eta Geminorum was a challenge!

      Captured through January and into early Febraury. I have dated the image for today's reprocess.

      Data acquisition: Barry Wilson & Steve Milne

      Processing: Barry Wilson

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