Astronomy:NGC 4246
| NGC 4246 | |
|---|---|
| File:250px Spiral galaxy NGC 4246 | |
| Observation data (J2000 epoch) | |
| Constellation | Virgo |
| Right ascension | 12h 17m 58.1131s[1] |
| Declination | +07° 11′ 09.376″[1] |
| Redshift | 0.012405[1] |
| Helio 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, IC 3113, UGC 7334, MCG+01-31-041, PGC 39479[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 4246:
- 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
References
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 "Results for object NGC 4246". NASA and Caltech. http://ned.ipac.caltech.edu/byname?objname=NGC+4246.
- ↑ "Distance Results for NGC 4246". NASA. https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+4246.
- ↑ 3.0 3.1 Seligman, Courtney. "New General Catalogue Objects: NGC 4246". https://cseligman.com/text/atlas/ngc42.htm#4246.
- ↑ "NGC 4246". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+4246.
- ↑ 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.
- ↑ Kowal, C.; Huchra, J.; Sargent, W. L. W. (1976). "The 1975 Palomar supernova search". Publications of the Astronomical Society of the Pacific 88: 521. doi:10.1086/129978. Bibcode: 1976PASP...88..521K.
- ↑ "SN 1975C". IAU. https://www.wis-tns.org/object/1975C.
- ↑ Maza, J.; Gonzalez, L. E. (1984). "Possible Supernova in NGC 4246". International Astronomical Union Circular (3921): 1. Bibcode: 1984IAUC.3921....1M.
- ↑ "SN 1984U". IAU. https://www.wis-tns.org/object/1984U.
External links
- NGC 4246 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
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