NGC 6492
From Wikipedia, the free encyclopedia
Galaxy in the constellation Pavo
| NGC 6492 | |
|---|---|
| Spiral galaxy NGC 6492 | |
| Observation data (J2000 epoch) | |
| Constellation | Pavo |
| Right ascension | 18h 02m 48.377s[1] |
| Declination | −66° 25′ 50.015″[1] |
| Redshift | 0.014482[1] |
| Heliocentric radial velocity | 4342 ± 8 km/s[1] |
| Distance | 209.3 ± 14.6 Mly (64.17 ± 4.49 Mpc)[1] |
| Apparent magnitude (V) | 11.5[1] |
| Characteristics | |
| Type | SA(rs)bc?[1] |
| Size | ~179,200 ly (54.94 kpc) (estimated)[1] |
| Apparent size (V) | 2.5′ ×ばつ 1.2′[1] |
| Other designations | |
| ESO 102-022, IRAS 17576-6625, 2MASX J18024831-6625503, PGC 61315[1] | |
NGC 6492 is a spiral galaxy in the constellation of Pavo. Its velocity with respect to the cosmic microwave background is 4351 ± 8 km/s, which corresponds to a Hubble distance of 209.3 ± 14.6 Mly (64.17 ± 4.49 Mpc).[1] In addition, five non redshift measurements give a distance of 183.10 ± 12.28 Mly (56.140 ± 3.766 Mpc).[2] The galaxy was discovered by British astronomer John Herschel on 22 July 1835.[3]
The SIMBAD database lists NGC 6492 as 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.[4]
Supernovae
[edit ]Two supernovae have been observed in NGC 6492:
- South African amateur astronomer Berto Monard discovered SN 2004fv (type Ia, mag. 14.8) on 4 November 2004.[5] [6]
- The GOTO telescope array discovered SN 2024sky (type II, mag. 16.65) on 19 August 2024.[7]
See also
[edit ]References
[edit ]- ^ a b c d e f g h i j k "Results for object NGC 6492". NASA/IPAC Extragalactic Database. NASA and Caltech . Retrieved 13 November 2024.
- ^ "Distance Results for NGC 6492". NASA/IPAC EXTRAGALACTIC DATABASE. NASA . Retrieved 13 November 2024.
- ^ Seligman, Courtney. "NGC 6492". Celestial Atlas. Retrieved 13 November 2024.
- ^ "NGC 6492". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 13 November 2024.
- ^ Monard, L. A. G.; Africa, S. (2004). "Supernova 2004fv in NGC 6492". International Astronomical Union Circular (8430): 1. Bibcode:2004IAUC.8430....1M.
- ^ "SN 2004fv". Transient Name Server. IAU . Retrieved 13 November 2024.
- ^ "SN 2024sky". Transient Name Server. IAU . Retrieved 13 November 2024.
External links
[edit ]- NGC 6492 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
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