NGC 958 is a barred spiral galaxy in the constellation of Cetus. Its velocity with respect to the cosmic microwave background is 5505 ± 17 km/s, which corresponds to a Hubble distance of 81.20 ± 5.69 Mpc (∼265 million light-years).[1] However, 19 non-redshift measurements give a distance of 58.93 ± 12.91 Mpc (∼192 million light-years).[2] The galaxy was discovered by German-British astronomer William Herschel on 20 September 1784.[3]
| NGC 958 | |
|---|---|
 The barred spiral galaxy NGC 958. | |
| Observation data (J2000 epoch) | |
| Constellation | Cetus |
| Right ascension | 02h 30m 42.83s[1] |
| Declination | −02° 56′ 20.4″[1] |
| Redshift | 0.019150 [1] |
| Heliocentric radial velocity | 5741 ± 2 km/s[1] |
| Distance | 264.8 ± 18.6 Mly (81.20 ± 5.69 Mpc)[1] |
| Apparent magnitude (V) | 12.2[1] |
| Characteristics | |
| Type | SB(rs)c?[1] |
| Size | ~161,200 ly (49.43 kpc) (estimated)[1] |
| Apparent size (V) | 2.9' x 0.9'[1] |
| Other designations | |
| IRAS 02281-0309, 2MASX J02304283-0256204, MCG -01-07-019, PGC 9560[1] | |
The Simbad database lists NGC 958 as a Seyfert II Galaxy, i.e. it has a quasar-like nuclei with very high surface brightnesses whose spectra reveal strong, high-ionisation emission lines, but unlike quasars, the host galaxy is clearly detectable.[4] The NASA/IPAC Extragalactic Database (NED) lists NGC 958 as a Luminous infrared galaxy (LIRG).[1]
Three supernovae have been observed in NGC 958: SN 2005A (type Ia, mag. 17.1),[5] SN 2022ao (type Ic, mag. 18),[6] and SN 2022acbu (type II, mag. 20.3).[7]
See also
editReferences
edit- ^ a b c d e f g h i j k l "NASA/IPAC Extragalactic Database". Results for NGC 958. Retrieved 10 August 2024.
- ^ "Distance Results for NGC 958". NASA/IPAC EXTRAGALACTIC DATABASE. NASA. Retrieved 10 August 2024.
- ^ Seligman, Courtney. "NGC 958". Celestial Atlas. Retrieved 10 August 2024.
- ^ "SIMBAD astronomical database". Entry for NGC 958. Retrieved 10 August 2024.
- ^ "Transient Name Server". Entry for SN 2005A. Retrieved 10 August 2024.
- ^ "Transient Name Server". Entry for SN 2022ao. Retrieved 10 August 2024.
- ^ "Transient Name Server". Entry for SN 2022acbu. Retrieved 10 August 2024.
External links
edit
Media related to NGC 958 at Wikimedia Commons- NGC 958 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
