IC 443 [SEP] constellation
IC 443
IC 443 (also known as the Jellyfish Nebula and Sharpless 248 (Sh2-248)) is a galactic supernova remnant (SNR) in the constellation Gemini. On the plane of the sky, it is located near the star Eta Geminorum.
Its distance is roughly 5,000 light years from Earth.
IC 443 may be the remains of a supernova that occurred 3,000 - 30,000 years ago. The same supernova event likely created the neutron star CXOU J061705.3+222127, the collapsed remnant of the stellar core
NGC 443
NGC 443 is a lenticular galaxy of type S0/(r)a? located in the constellation Pisces. It was first discovered on October 8, 1861 by Heinrich d'Arrest (and later listed as NGC 443), and was also spotted on October 17, 1903 by Stéphane Javelle (and later listed as IC 1653). It was described by Dreyer as "faint, small, round, 15th magnitude star 8 seconds of time to west on parallel (that is, at the same declination)."