NGC 930 is a magnitude +12.5? missing object (possibly a supernova) found one arcminute north-west of the face-on spiral galaxy NGC 932, located 188 million light-years away in the constellation Aries.
The object was discovered by English astronomer Ralph Copeland using a 182.88 cm (72 inch) speculum reflector at Birr Castle on the 26th October 1872.
NGC 930 is lost. Copeland found it just an arcminute northwest of NGC 932 with Lord Rosse's 72-inch. He saw it only one night, and made a micrometric measurement of it with respect to the nucleus of NGC 932. Two stars that he also measured (on three other nights as well) are just where he places them. But there is no trace of his nebula. Read more