NGC 2305 is an elliptical galaxy in the constellation of Volans. Its velocity with respect to the cosmic microwave background is 3605 ± 21 km/s, which corresponds to a Hubble distance of 53.17 ± 3.75 Mpc (∼174 million light-years).[1] It was discovered by British astronomer John Herschel on 30 November 1834.[2]
| NGC 2305 | |
|---|---|
 The elliptical galaxy NGC 2305 (center) with NGC 2307 (below). | |
| Observation data (J2000 epoch) | |
| Constellation | Volans |
| Right ascension | 06h 37m 37.3714s[1] |
| Declination | −64° 16′ 23.523″[1] |
| Redshift | 0.011671 [1] |
| Heliocentric radial velocity | 3499 ± 20 km/s[1] |
| Distance | 173.4 ± 12.2 Mly (53.17 ± 3.75 Mpc)[1] |
| Apparent magnitude (V) | 11.7[1] |
| Characteristics | |
| Type | E2: pec[1] |
| Size | ~188,200 ly (57.71 kpc) (estimated)[1] |
| Apparent size (V) | 2.1' x 1.5'[1] |
| Other designations | |
| 2MASX J06483729-6416240, PGC 19641, ESO 087- G 044[1] | |
The galaxy NGC 2305 forms a physical pair with NGC 2307, collectively named RR 143, with a distance of at least 51 kpc between the galaxies.[3]
Two supernovae have been observed in NGC 2305: SN 2011fn (type I, mag 17.9)[4] and SN 2023txv (type Ia, mag 17.4).[5] There is some uncertainty about SN 2011fn; it was classified as either type Ia or type Ic, and it is possible that the host galaxy of this supernova was not NGC 2305, but instead the nearby galaxy 2MASS J06483060-6415588.[6]
See also
editReferences
edit- ^ a b c d e f g h i j k "NASA/IPAC Extragalactic Database". Results for NGC 2305. Retrieved 5 August 2024.
- ^ Celestial Atlas entry for NGC 2305. Retrieved 5 August 2024.
- ^ Trinchieri, G.; Rampazzo, R. (2001). "ROSAT-HRIobservations of six southern galaxy pairs". Astronomy & Astrophysics. 374 (2): 454. Bibcode:2001A&A...374..454T. doi:10.1051/0004-6361:20010750.
- ^ Transient Name Server entry for SN 2011fn. Retrieved 5 August 2024.
- ^ Transient Name Server entry for SN 2023txv. Retrieved 5 August 2024.
- ^ Central Bureau for Astronomical Telegrams, Electronic Telegram No. 2814, 11 September 2011. Retrieved 5 August 2024.
External links
edit
Media related to NGC 2305 at Wikimedia Commons- NGC 2305 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
