SN 1917A
Encyclopedia
SN 1917A is a supernova that occurred in the Fireworks Galaxy
on 19 July 1917. Discovered by George Willis Ritchey
, it reached a peak magnitude of 14.6 mag and is 37"W and 105"S of the core of the Fireworks Galaxy
NGC 6946
NGC 6946, , is an intermediate spiral galaxy about 22 million light-years away, on the border between the constellations Cepheus and Cygnus. It was discovered by William Herschel on September 9, 1798...
on 19 July 1917. Discovered by George Willis Ritchey
George Willis Ritchey
George Willis Ritchey was an American optician and telescope maker and astronomer born at Tuppers Plains, Ohio....
, it reached a peak magnitude of 14.6 mag and is 37"W and 105"S of the core of the Fireworks Galaxy