| NGC 668 | |
|---|---|
 Pan-STARRS image of NGC 668 | |
| Observation data (J2000 epoch) | |
| Constellation | Andromeda |
| Right ascension | 01h 46m 22.7s[1] |
| Declination | 36° 27′ 37″[1] |
| Redshift | 0.015004[1] |
| Heliocentric radial velocity | 4498 km/s[1] |
| Distance | 200 Mly (60 Mpc)[1] |
| Group or cluster | Abell 262 |
| Apparent magnitude (V) | 13.74[1] |
| Characteristics | |
| Type | Sb[1] |
| Size | ~76,000 ly (23.4 kpc) (estimated)[1] |
| Apparent size (V) | 1.8 x 1.2[1] |
| Other designations | |
| UGC 1238, MCG +06-05-003, PGC 6502[1] | |
NGC 668 is a spiral galaxy located 200 million light-years away[2] in the constellation Andromeda. It was discovered by astronomer Édouard Stephan on December 4, 1880[3] and is a member of Abell 262.[4][5][6][7]
- ^ a b c d e f g h i j "NASA/IPAC Extragalactic Database". Results for NGC 668. Retrieved 2018-11-13.
- ^ "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2018-11-14.
- ^ "New General Catalog Objects: NGC 650 - 699". cseligman.com. Retrieved 2018-11-14.
- ^ P., Fouque; E., Gourgoulhon; P., Chamaraux; G., Paturel (May 1992). "Groups of galaxies within 80 Mpc. II - The catalogue of groups and group members". Astronomy and Astrophysics Supplement Series. 93: 211. Bibcode:1992A&AS...93..211F. ISSN 0365-0138.
- ^ M., Garcia, A. (July 1993). "General study of group membership. II - Determination of nearby groups". Astronomy and Astrophysics Supplement Series. 100: 47. Bibcode:1993A&AS..100...47G. ISSN 0365-0138.
{{cite journal}}: CS1 maint: multiple names: authors list (link) - ^ Giuricin, Giuliano; Marinoni, Christian; Ceriani, Lorenzo; Pisani, Armando (November 2000). "Nearby Optical Galaxies: Selection of the Sample and Identification of Groups". The Astrophysical Journal. 543 (1): 178–194. arXiv:astro-ph/0001140. Bibcode:2000ApJ...543..178G. doi:10.1086/317070. ISSN 0004-637X. S2CID 9618325.
- ^ "Detailed Object Classifications". ned.ipac.caltech.edu. Retrieved 2018-11-16.