Astronomy:NGC 958
| NGC 958 | |
|---|---|
 NGC 958 imaged by SDSS | |
| Observation data (J2000 epoch) | |
| Constellation | Cetus |
| Right ascension | 02h 30m 42.8350s[1] |
| Declination | −02° 56′ 20.126″[1] |
| Redshift | 0.019150 [1] |
| Helio 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′ × 0.9′[1] |
| Other designations | |
| IRAS 02281-0309, MCG-01-07-019, PGC 9560[1] | |
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 closer 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]
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]
Supernovae
Three supernovae have been observed in NGC 958:
- SN 2005A (Type Ia, mag. 17.1) was discovered by the Lick Observatory Supernova Search (LOSS) on 5 January 2005.[5][6]
- SN 2022ao (Type Ic, mag. 17.997) was discovered by ATLAS on 5 January 2022.[7]
- SN 2022acbu (Type II, mag. 20.34) was discovered by the Zwicky Transient Facility on 30 November 2022.[8]
See also
References
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 "Results for object NGC 958". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+958.
- ↑ "Distance Results for NGC 958". NASA. https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+958.
- ↑ Seligman, Courtney. "NGC 958". https://cseligman.com/text/atlas/ngc9a.htm#958.
- ↑ "NGC 958". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+958.
- ↑ Graham, J.; Li, W. (2005). "Supernova 2005A in NGC 958". International Astronomical Union Circular (8459): 3. Bibcode: 2005IAUC.8459....3G. http://www.cbat.eps.harvard.edu/iauc/08400/08459.html#Item2.
- ↑ "SN 2005A". IAU. https://www.wis-tns.org/object/2005A.
- ↑ "SN 2022ao". IAU. https://www.wis-tns.org/object/2022ao.
- ↑ "SN 2022acbu". IAU. https://www.wis-tns.org/object/2022acbu.
External links
- NGC 958 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
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