IC 443 (also known as the Jellyfish Nebula and Sharpless 248 (Sh2-248)) is a galactic supernova remnant (SNR) in the constellation Gemini. Its distance is roughly 5,000 light years from Earth.
IC 443 may be the remains of a supernova that occurred 30,000 – 35,000 years ago. The same supernova event likely created the neutron star CXOU J061705.3+222127, the collapsed remnant of the stellar core near the apex of the nebula. The location in a star forming region and the presence of a neutron star favor a Type II supernova, the ultimate fate of a massive star, as the progenitor explosion. IC 443 is one of the best-studied cases of supernova remnants interacting with surrounding molecular clouds.
IC 443 – Jellyfish Nebula
Photographed with the RC8″ reflector telescope and the ASI 2600MC color CMOS camera in Stuvsta, March 14th 2025. Exposure was 30*3 min + 23*4 min with IDAS GNB filter. Post-processing in Pixinsight. 100% full moon during most of the exposure.
IC 443 – Jellyfish Nebula
Photographed with the RC8″ reflector telescope and the ASI 2600MC color CMOS camera in Stuvsta, March 14th 2025. Exposure was 30*3 min + 23*4 min with IDAS GNB filter. Post-processing in Pixinsight. 100% full moon during most of the exposure.