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  • Kevin Hearn

IC443 Jelly Fishing Again

Updated: Jan 29

The Jellyfish Nebula (IC 443) is a supernova remnant located in the constellation Gemini. It lies at an approximate distance of 5,000 light years from Earth and has an apparent magnitude of 12. The Jellyfish Nebula is a remnant of a supernova that occurred in the Milky Way between 3,000 and 30,000 years ago. The supernova event produced the nebula and the neutron star CXOU J061705.3+222127. The presence of the neutron star and the nebula’s location in a star forming region indicate that the remnant was created by a Type II supernova, one triggered by a rapid collapse and violent explosion of a star with a mass at least 8 times that of the Sun.

(Final Image)


Unfortunately my original journey to the Jelly Fish Nebula I failed to centre the image correctly at the start of capturing the images and the result was a Jelly fish with his tentacles cut in half

I wanted to redo this Nebula again correctly and started capturing the new data in January 2018. This past week I revisited this this target. I wasted 4 hours on Tuesday night as I did not rotate the Camera to the same angle as I had started capturing data in January 2018 which resulted in incorrectly framed imaged when stacked.


Last night I finally captured the final HA Filter images I needed to complete the image, showing a fully centre IC443 Jelly Fish Nebula mapped to the Hubble Scope Colours. The final image was taken using my Skywatcher ED80 Scope, Guided, using Atik460 Mono Camera, sensor cooled to -10. Narrowband filters and mapped to the Hubble Colour Pallet.

Comprises 15x20min Ha Filter, 6x20min Oiii Filter, 14x20min Sii Filter

Total Imaging: 11hrs 40mins

Stacked in Deep Sky Stack (10 Darks -10) and processed in Photoshop CS5.


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