SN 1961I

SN 1961i was a supernova that was discovered in June 1961 in the Messier 61 (NGC 4303) galaxy, by Milton L. Humason at the Palomar Observatory,^[1] the brightest of 16 supernovae found at Palomar that year.^[2] Although it was originally considered by Fritz Zwicky to be the prototype of a Type III supernova, subsequent researchers have classified it as a Type II supernova.^[3][4]

SN 1961i

Event type	Supernova
SN.II
Constellation	Virgo
Other designations	SN 1961I