NGC 819

NGC 819 is a spiral galaxy approximately 302 million light-years away from Earth in the constellation of Triangulum. It forms a visual pair with the galaxy 5.7' WNW.

Discovery

NGC 819 was discovered by German astronomer Heinrich Louis d'Arrest on September 20, 1865 with the 11-inch refractor at Copenhagen. ÃÂdouard Stephan independently found the galaxy again on September 15, 1871 with the 31" reflector at Marseille Observatory.

Four supernovae have been observed in NGC 819:

SN 2007hb (Type Ib/c, mag. 19.5) was discovered by Nearby Supernova Factory on August 24, 2007. It was located at RA , DEC , J2000.0.
SN 2016hkn (TypeII, mag. 17.2) was discovered by Paolo Campaner on October 22, 2016. It was located at RA , DEC .
SN 2020mbe (TypeIc, mag. 18.6) was discovered by Gaia Photometric Science Alerts on January 10, 2020.
SN 2026fau (Type II, mag. 18.5942) was discovered by the Zwicky Transient Facility on March 7, 2026.