NGC 4411B
| NGC 4411B | |
|---|---|
| NGC 4411B imaged by the Vera C. Rubin Observatory | |
| Observation data (J2000 epoch) | |
| Constellation | Virgo |
| Right ascension | 12h 26m 47.2398s[1] |
| Declination | +08° 53′ 04.619″[1] |
| Redshift | 0.004243±0.000003[1] |
| Heliocentric radial velocity | 1,272±1 km/s[1] |
| Distance | 73.06 ± 18.26 Mly (22.400 ± 5.600 Mpc)[1] |
| Group or cluster | Virgo Cluster |
| Apparent magnitude (V) | 12.98[1] |
| Characteristics | |
| Type | SAB(s)cd[1] |
| Size | ~68,000 ly (20.85 kpc) (estimated)[1] |
| Apparent size (V) | 2.5′ ×ばつ 2.5′[1] |
| Other designations | |
| KPG 336B, IRAS 12242+0909, UGC 7546, MCG +02-32-055, PGC 040745, CGCG 070-082[1] | |
NGC 4411B (also known as UGC 7546) is a barred spiral galaxy in the constellation of Virgo. Its velocity with respect to the cosmic microwave background is 1,610±24 km/s, which corresponds to a Hubble distance of 77.4 ± 5.5 Mly (23.74 ± 1.70 Mpc).[1] Two non-redshift measurements give a similar distance of 73.06 ± 18.26 Mly (22.400 ± 5.600 Mpc).[2] It was discovered by French astronomer Guillaume Bigourdan on 25 April 1895.[3] There was a longstanding confusion of identification between this galaxy and the neighboring spiral galaxy NGC 4411.[3] Therefore, this galaxy, despite its common name, was not a part of the original New General Catalogue.
NGC 4411B and NGC 4411 form a pair of galaxies, referred to as KPG 336.[4] Both galaxies are members of the Virgo Cluster.
NGC 4411B is a Seyfert II Galaxy, i.e. it has 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.[5]
Supernovae
[edit ]Two supernovae have been observed in NGC 4411B.
- SN 1992ad (Type II, mag. 13.5) was discovered by Robert Evans on 1 July 1992.[6] [7]
- SN 2021smj (Type Ia, mag. 17.025) was discovered by ATLAS on 8 July 2021.[8]
See also
[edit ]References
[edit ]- ^ a b c d e f g h i j k "Results for object NGC 4411b". NASA/IPAC Extragalactic Database. NASA and Caltech . Retrieved 19 July 2025.
- ^ "Distance Results for NGC 4411b". NASA/IPAC EXTRAGALACTIC DATABASE. NASA . Retrieved 19 July 2025.
- ^ a b Seligman, Courtney. "New General Catalogue Objects: NGC 4411". Celestial Atlas. Retrieved 19 July 2025.
- ^ Karachentsev, I. D. (1972). "Catalogue of isolated pairs of galaxies in the northern hemisphere". Soobshcheniya Spetsial'noj Astrofizicheskoj Observatorii. 7: 1. Bibcode:1972SoSAO...7....1K.
- ^ "UGC 7546". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 19 July 2025.
- ^ McNaught, R. H.; Evans, R.; Spyromilio, J.; Taylor, K.; Hawkins, M.; Vernon, P. (1992). "Supernova 1992ad in NGC 4411B". International Astronomical Union Circular (5552): 1. Bibcode:1992IAUC.5552....1M.
- ^ "SN 1992ad". Transient Name Server. IAU . Retrieved 19 July 2025.
- ^ "SN 2021smj". Transient Name Server. IAU . Retrieved 19 July 2025.
External links
[edit ]- NGC 4411B on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images