Astronomy:NGC 6492
From HandWiki
| NGC 6492 | |
|---|---|
 NGC 6492 imaged by SDSS | |
| Observation data (J2000 epoch) | |
| Constellation | Pavo |
| Right ascension | 18h 02m 48.377s[1] |
| Declination | −66° 25′ 50.015″[1] |
| Redshift | 0.014482[1] |
| Helio 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′ × 1.2′[1] |
| Other designations | |
| ESO 102-022, IRAS 17576-6625, 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
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
References
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 "Results for object NGC 6492". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+6492.
- ↑ "Distance Results for NGC 6492". NASA. https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+6492.
- ↑ Seligman, Courtney. "NGC 6492". https://cseligman.com/text/atlas/ngc64a.htm#6492.
- ↑ "NGC 6492". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+6492.
- ↑ Monard, L. A. G.; Africa, S. (2004). "Supernova 2004fv in NGC 6492". International Astronomical Union Circular (8430): 1. Bibcode: 2004IAUC.8430....1M. http://www.cbat.eps.harvard.edu/iauc/08400/08430.html#Item1.
- ↑ "SN 2004fv". IAU. https://www.wis-tns.org/object/2004fv.
- ↑ "SN 2024sky". IAU. https://www.wis-tns.org/object/2024sky.
External links
- NGC 6492 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
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