SN 1939C
SN 1939C was a supernova in the Fireworks Galaxy discovered by Fritz Zwicky on 17 July 1939. With a right ascension of 20:34:23.0 and a declination of +60:09:37.3, it was 215"W and 24"N away from the center of the Fireworks Galaxy. It was found at magnitude 14.4, after it had peaked, and was estimated to have been as bright as magnitude 13.