IC443 is a supernova remnant, also known as the Medusa Nebula. You can see the explosion of this supernova interact in their environment (Sh 2-249). This star became a supernova from about 5,000 to 10,000 years.
The catch data are as follows:
- 18 x 1800" Ha, 12 x 1800" OIII, 12 x 1800" SII
- Long Perng 100ED f4.8 and Atik 383L +
Best Regards,
Alfonso Carreño.