NGC 493

NGC 493
NGC 493
SDSS view of NGC 493
Observation data (J2000 epoch)
ConstellationCetus
Right ascension01h 22m 09.54s
Declination+00° 56′ 47.5″
Redshift0.007799 ± 0.000017
Heliocentric radial velocity(+2329 ± 5) km/s
Distance90 Mly
Apparent magnitude (V)12.2
Characteristics
TypeSAB(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.[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

  1. ^ "Revised NGC Data for NGC 493". spider.seds.org. Retrieved 2017-10-05.
  2. ^ "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2017-10-05.
  3. ^ "astronomy-mall.com/Adventures.In.Deep.Space/NGC%201-7840%20complete.htm". Astronomy Mall.
  4. ^ "SN 1971S". Transient Name Server. IAU. Retrieved 3 December 2024.
  5. ^ "SN 2016hgm". Transient Name Server. IAU. Retrieved 3 December 2024.