| NGC 493 | |
|---|---|
 SDSS view of NGC 493 | |
| Observation data (J2000 epoch) | |
| Constellation | Cetus |
| Right ascension | 01 22 09.54 |
| Declination | +00° 56′ 47.5″ |
| Redshift | 0.007799 ± 0.000017 |
| Heliocentric radial velocity | (+2329 ± 5) km/s |
| Distance | 90 Mly |
| Apparent magnitude (V) | 12.2 |
| Characteristics | |
| Type | SAB(s)cd? |
| Apparent size (V) | 4.3′ × 1.7′ |
| Other designations | |
| PGC 4979, GC 281, UGC 914, 2MASS J01220898+0056432, Z 385.84, MGC +00-04-099, IRAS 01195+0041, H 3.594, h 105 | |
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 (type unknown, mag. 15.5) was discovered by L. Pigatto on 15 November 1971.
- SN 2016hgm (type II, mag. 17.9) was discovered by SNHunt on 19 October 2016.
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
| Astronomical catalogs | |
|---|---|
| NGC | |
| PGC | |
| UGC | |
