NGC 493, also occasionally referred to as PGC 4979 or GC 281, is a barred spiral galaxy in the constellation Cetus. It is located approximately 90 million light-years from Earth and was discovered on December 20, 1786 by astronomer William Herschel. It was later also observed by his son, John Herschel. John Dreyer, creator of the New General Catalogue, described the galaxy as "very faint, large, much extended 60°" with "a little brighter middle".
Two supernovae have been observed in NGC 493: SN 1971S (mag. 15.5) and SN 2016hgm (type II, mag. 17.9).
See also
Spiral galaxy
List of NGC objects (1–1000)
References
External links
SEDS
Spiral galaxies
Pisces (constellation) 0493 4979 Astronomical objects discovered in 1786 Discoveries by William Herschel