IC 831

IC 831 is a type E-S0 elliptical galaxy located 300 million light-years away from the Solar System in the constellation of Coma Berenices. It is estimated to be 60,000 light-years in diameter and was first discovered on 25 February 1892 by Rudolf Spitaler, an Austrian astronomer. It is not known whether it has an active galactic nucleus.

Supernova

Type Ia supernova, iPTF14atg was discovered in IC 831 on May 3, 2015, which was similar to SN 2002es that exploded prior to that, in UGC 2708, a lenticular galaxy. The progenitor type was a white dwarf, in which when it exploded, some of the shockwaves impacted its companion star. It was discovered by Intermediate Palomar Transient Factory in California.