NGC 493, also occasionally referred to as PGC 4979 or GC 281, is a barred spiral galaxy in the constellation Cetus.[1] It is located approximately 90 million light-years from Earth and was discovered on December 20, 1786 by astronomer William Herschel.[2] 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".[3]
Two supernovae have been observed in NGC 493:
- SN 1971S (type unknown, mag. 15.5) was discovered by L. Pigatto on 15 November 1971.[4]
- SN 2016hgm (type II, mag. 17.9) was discovered by SNHunt on 19 October 2016.[5]
See also
References
- ^ "Revised NGC Data for NGC 493". spider.seds.org. Retrieved 2017-10-05.
- ^ "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2017-10-05.
- ^ "astronomy-mall.com/Adventures.In.Deep.Space/NGC%201-7840%20complete.htm". Astronomy Mall.
- ^ "SN 1971S". Transient Name Server. IAU. Retrieved 3 December 2024.
- ^ "SN 2016hgm". Transient Name Server. IAU. Retrieved 3 December 2024.
External links
Media related to NGC 493 at Wikimedia Commons- NGC 493 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
- SEDS
