NGC 493

NGC 493
SDSS view of NGC 493
Observation data (J2000 epoch)
Constellation	Cetus
Right ascension	01h 22m 09.54s
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.^[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 (mag. 15.5)^[4] and SN 2016hgm (type II, mag. 17.9).^[5]

See also

• Spiral galaxy
• List of NGC objects (1–1000)

References

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