NGC 6492

NGC 6492
Spiral galaxy NGC 6492
Observation data (J2000 epoch)
ConstellationPavo
Right ascension18h 02m 48.377s[1]
Declination−66° 25′ 50.015″[1]
Redshift0.014482[1]
Heliocentric radial velocity4342 ± 8 km/s[1]
Distance209.3 ± 14.6 Mly (64.17 ± 4.49 Mpc)[1]
Apparent magnitude (V)11.5[1]
Characteristics
TypeSA(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, 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]

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] The GOTO telescope array discovered SN 2024sky (type II, mag. 16.65) on 19 August 2024.[6]

  1. ^ 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.
  2. ^ "Distance Results for NGC 6492". NASA/IPAC EXTRAGALACTIC DATABASE. NASA. Retrieved 13 November 2024.
  3. ^ Seligman, Courtney. "NGC 6492". Celestial Atlas. Retrieved 13 November 2024.
  4. ^ "NGC 6492". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 13 November 2024.
  5. ^ "SN 2004fv". Transient Name Server. IAU. Retrieved 13 November 2024.
  6. ^ "SN 2024sky". Transient Name Server. IAU. Retrieved 13 November 2024.