NGC 2708 is a spiral galaxy in the constellation of Hydra. Its velocity with respect to the cosmic microwave background is 2315 ± 22 km/s, which corresponds to a Hubble distance of 34.15 ± 2.41 Mpc (∼111 million light-years).[1] It was discovered by German-British astronomer William Herschel on 6 January 1785.[2] This galaxy was also observed by British astronomer John Herschel on 12 March 1826, and later listed as NGC 2727.[2]
| NGC 2708 | |
|---|---|
 The spiral galaxy NGC 2708. | |
| Observation data (J2000 epoch) | |
| Constellation | Hydra |
| Right ascension | 08h 56m 08.05s[1] |
| Declination | −03° 21′ 36.4″[1] |
| Redshift | 0.006698 [1] |
| Heliocentric radial velocity | 2008 ± 5 km/s[1] |
| Distance | 111.4 ± 7.9 Mly (34.15 ± 2.41 Mpc)[1] |
| Group or cluster | NGC 2708 Group (LGG 164) |
| Apparent magnitude (V) | 12.0[1] |
| Characteristics | |
| Type | SAB(s)b pec?[1] |
| Size | ~98,800 ly (30.29 kpc) (estimated)[1] |
| Apparent size (V) | 2.7' x 1.4'[1] |
| Other designations | |
| IRAS 08535-0309, 2MASX J08560804-0321363, NGC 2727, MCG +00-23-015, PGC 25097, CGCG 005-034[1] | |
The SIMBAD database lists NGC 2708 as a Seyfert II galaxy,[3] i.e. a galaxy with a quasar-like nucleus with very high surface brightnesses whose spectra reveal strong, high-ionisation emission lines, but unlike quasars, the host galaxy is clearly detectable.
One supernova has been observed in NGC 2708: SN 2023bee (type Ia, mag. 17.3).[4]
NGC 2708 Group
editAccording to A.M. Garcia, NGC 2708 is the namesake of the four member NGC 2708 group (also known as LGG 164). The other three galaxies are: NGC 2695, NGC 2699, and NGC 2706.[5]
See also
editReferences
edit- ^ a b c d e f g h i j k "NASA/IPAC Extragalactic Database". Results for NGC 2708. Retrieved 8 August 2024.
- ^ a b Seligman, Courtney. "New General Catalogue Objects: NGC 2708". Celestial Atlas. Retrieved 10 September 2024.
- ^ "NGC 2708". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 10 September 2024.
- ^ "SN 2023bee". Transient Name Server. IAU. Retrieved 10 September 2024.
- ^ Garcia, A. M. (1993). "General study of group membership. II. Determination of nearby groups". Astronomy and Astrophysics Supplement Series. 100: 47. Bibcode:1993A&AS..100...47G.
External links
edit
Media related to NGC 2708 at Wikimedia Commons- NGC 2708 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
