NGC 492, also occasionally referred to as PGC 4976 or GC 280, is a barred spiral galaxy in the constellation Pisces.[1] It is located approximately 590 million light-years from Earth and was discovered on December 6, 1850 by Irish engineer Bindon Blood Stoney.[2] Although John Dreyer, creator of the New General Catalogue, credits the discovery to astronomer William Parsons, 3rd Earl of Rosse, he notes that many of his claimed discoveries were made by one of his assistants. In the case of NGC 492, the discovery was made by Bindon Stoney,[3] who discovered it along with NGC 486, NGC 490 and NGC 500 during his observation of NGC 488 using Lord Rosse's 72" telescope. [4]

NGC 492
SDSS view of NGC 492
Observation data (J2000 epoch)
Constellation	Pisces
Right ascension	01h 22m 13.60s
Declination	+05° 25′ 01.0″
Redshift	0.047449
Helio radial velocity	(13888 ± 36) km/s
Distance	590 Mly
Apparent magnitude (V)	15.6
Characteristics
Type	SB?
Apparent size (V)	0.6′ × 0.5′
Other designations
PGC 4976, GC 280, 2MASS J01221356+0525012, Z 411.36, MGC +01-04-038

The object was initially described by Stoney as "extremely faint, small, round, 25" diameter, low surface brightness, no concentration". The position noted was "on line with a mag 12 star 3.7' NW and a faint pair of mag 14-14.5 stars 2' NW".[5]

See also

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

References

External links

• Media related to NGC 492 at Wikimedia Commons
• NGC 492 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
• SEDS

На других языках

[de] NGC 492