NGC 4246

NGC 4246
Spiral galaxy NGC 4246
Observation data (J2000 epoch)
Constellation	Virgo
Right ascension	12^h 17^m 58.1131^s[1]
Declination	+07° 11′ 09.376″[1]
Redshift	0.012405[1]
Heliocentric radial velocity	3719 ± 2 km/s[1]
Distance	172.01 ± 10.57 Mly (52.74 ± 3.241 Mpc)[1]
Apparent magnitude (V)	12.7[1]
Characteristics
Type	SA(s)c[1]
Size	~133,600 ly (40.97 kpc) (estimated)[1]
Apparent size (V)	2.3′ × 1.2′[1]
Other designations
HOLM 359B, 2MASX J12175811+0711091, IC 3113, UGC 7334, MCG +01-31-041, PGC 39479, CGCG 041-070[1]

NGC 4246 is an unbarred spiral galaxy in the constellation of Virgo. Its velocity with respect to the cosmic microwave background is 4064 ± 24 km/s, which corresponds to a Hubble distance of 195.5 ± 13.7 Mly (59.94 ± 4.21 Mpc).^[1] However, 20 non-redshift measurements give a distance of 172.01 ± 10.57 Mly (52.740 ± 3.241 Mpc).^[2] It was discovered by German-British astronomer William Herschel on 13 April 1784.^[3] It was also observed by German astronomer Arnold Schwassmann on 30 October 1899 and listed in the Index Catalogue as IC 3113.^[3]

According to the SIMBAD database, NGC 4246 is a LINER galaxy, i.e. a galaxy whose nucleus has an emission spectrum characterized by broad lines of weakly ionized atoms.^[4]

NGC 4246 along with NGC 4235 and NGC 4247 are listed together as Holm 359 in Erik Holmberg's A Study of Double and Multiple Galaxies Together with Inquiries into some General Metagalactic Problems, published in 1937.^[5]

Supernovae

Two supernovae have been observed in NGC 4273:

• SN 1975C (type unknown, mag. 18) was discovered by American astronomer Charles Kowal on 15 March 1975.^[6][7]
• SN 1984U (type unknown, mag. 18) was discovered by L. E. Gonzalez at the Cerro El Roble Observatory on 2 March 1984.^[8][9]

See also

• List of NGC objects (4001–5000)

References

1. "Results for object NGC 4246". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 22 November 2024.
2. "Distance Results for NGC 4246". NASA/IPAC EXTRAGALACTIC DATABASE. NASA. Retrieved 22 November 2024.
3. Seligman, Courtney. "New General Catalogue Objects: NGC 4246". Celestial Atlas. Retrieved 22 November 2024.
4. "NGC 4246". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 22 November 2024.
5. Holmberg, Erik (1937). "A Study of Double and Multiple Galaxies Together with Inquiries into some General Metagalactic Problems". Annals of the Observatory of Lund. 6: 1. Bibcode:1937AnLun...6....1H.
6. Kowal, C.; Huchra, J.; Sargent, W. L. W. (1976). "The 1975 Palomar supernova search". Publications of the Astronomical Society of the Pacific. 88: 521. Bibcode:1976PASP...88..521K. doi:10.1086/129978.
7. "SN 1975C". Transient Name Server. IAU. Retrieved 22 November 2024.
8. Maza, J.; Gonzalez, L. E. (1984). "Possible Supernova in NGC 4246". International Astronomical Union Circular (3921): 1. Bibcode:1984IAUC.3921....1M.
9. "SN 1984U". Transient Name Server. IAU. Retrieved 22 November 2024.

External links

• Media related to NGC 4246 at Wikimedia Commons
• NGC 4246 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images