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]
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. 17.2621) was discovered by the Distance Less Than 40 Mpc Survey (DLT40) on 1 February 2023.[4]
NGC 2708 Group
According 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
References
- ^ a b c d e f g h i j k "Results for NGC 2708". NASA/IPAC Extragalactic Database. NASA and Caltech. 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
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
You must be logged in to post a comment.