Celestial hemisphere:  Northern  ·  Constellation: Gemini (Gem)  ·  Contains:  IC 443  ·  IC 444  ·  The star Propus (ηGem)
IC 443 - Jellyfish nebula, Victor Van Puyenbroeck
IC 443 - Jellyfish nebula
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IC 443 - Jellyfish nebula, Victor Van Puyenbroeck
IC 443 - Jellyfish nebula
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Acquisition details

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Description

The Jellyfish nebula (IC 443): pure chaos.

It consists of gas and debris expelled during the super nova explosion of a massive star. This bubble-shaped supernova remnant in the constellation Gemini resembles a jellyfish, with intricate tentacles dangling below. The top right of the frame is filled with diffuse emissions from a different nebula, Sh2-249.

Also decided to shoot some RGB frames near the end of the night.

The color in Rev. B is (Ha-R)GB, with Ha as luminance.

Update 25/02/2018:

I had another clear night this week, and acquired one hour of OIII and one hour SII data.

The colors in Rev. C are tonemapped SII, Ha and OIII channels (Hubble palette), with Ha as luminance.

UPDATE 30/12/2018: Reprocessed with a new workflow to bring out more OIII. The background is pretty ugly because I had to use much more noise reduction on the extremely stretched OIII and SII channels.

Comments

Revisions

  • IC 443 - Jellyfish nebula, Victor Van Puyenbroeck
    Original
  • IC 443 - Jellyfish nebula, Victor Van Puyenbroeck
    B
  • IC 443 - Jellyfish nebula, Victor Van Puyenbroeck
    C
  • IC 443 - Jellyfish nebula, Victor Van Puyenbroeck
    E
  • Final
    IC 443 - Jellyfish nebula, Victor Van Puyenbroeck
    F

B

Description: HaRGB version

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C

Description: SHO tonemap with Ha as luminance

Uploaded: ...

E

Description: Trying out a new processing workflow: pure SHO combination and much stronger stretch on the OIII and SII data. No tone mapping. Downsampled 50% to improve SNR.

Uploaded: ...

F

Description: Ha-SHO with RGB stars. Updated tone mapping workflow (2019), compare to Rev. C.

Uploaded: ...

Sky plot

Sky plot

Histogram

IC 443 - Jellyfish nebula, Victor Van Puyenbroeck