NGC 6209

NGC 6209
NGC 6209 imaged by Legacy Surveys
Observation data (J2000 epoch)
ConstellationApus
Right ascension16h 54m 57.6600s
Declination−72° 35′ 11.900″
Redshift0.019564±0.0000330
Heliocentric radial velocity5,865±10 km/s
Distance247.90 ± 5.50 Mly (76.008 ± 1.685 Mpc)
Apparent magnitude (V)11.41
Characteristics
Type(R')SA(rs)bc
Size~222,300 ly (68.17 kpc) (estimated)
Apparent size (V)2.0′ × 1.6′
Other designations
ESO 043- G 008, IRAS 16489-7230, 2MASX J16545747-7235136, PGC 59252

NGC 6209 is a spiral galaxy in the constellation of Apus. Its velocity with respect to the cosmic microwave background is 5,916±11 km/s, which corresponds to a Hubble distance of 284.6 ± 19.9 Mly (87.26 ± 6.11 Mpc). However, 13 non-redshift measurements give a closer mean distance of 247.90 ± 5.50 Mly (76.008 ± 1.685 Mpc). It was discovered by British astronomer John Herschel on 28 June 1835.

NGC 6209 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. Additionally, NGC 6209 has a possible active galactic nucleus, i.e. it has a compact region at the center of a galaxy that emits a significant amount of energy across the electromagnetic spectrum, with characteristics indicating that this luminosity is not produced by the stars.

Supernovae

Two supernovae have been observed in NGC 6209:

See also

References

  1. 1 2 3 4 5 6 7 8 9 10 11 "Results for object NGC 6209". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 1 December 2025.
  2. ↑ "Distance Results for NGC 6209". NASA/IPAC Extragalactic Database. NASA. Retrieved 1 December 2025.
  3. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 6209". Celestial Atlas. Retrieved 1 December 2025.
  4. ↑ Chen, Yan-Ping; Zaw, Ingyin; Farrar, Glennys R.; Elgamal, Sana (2022). "A Uniformly Selected, Southern-sky 6dF, Optical AGN Catalog". The Astrophysical Journal Supplement Series. 258 (2): 29. arXiv:2111.13217. Bibcode:2022ApJS..258...29C. doi:10.3847/1538-4365/ac4157.
  5. 1 2 "NGC 6209". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 1 December 2025.
  6. ↑ Asmus, D.; Greenwell, C. L.; Gandhi, P.; Boorman, P. G.; Aird, J.; Alexander, D. M.; Assef, R. J.; Baldi, R. D.; Davies, R. I.; Hönig, S. F.; Ricci, C.; Rosario, D. J.; Salvato, M.; Shankar, F.; Stern, D. (2020). "Local AGN survey (LASr): I. Galaxy sample, infrared colour selection, and predictions for AGN within 100 MPC". Monthly Notices of the Royal Astronomical Society. 494 (2): 1784. arXiv:2003.05959. Bibcode:2020MNRAS.494.1784A. doi:10.1093/mnras/staa766.
  7. ↑ Wassilieff, A.; Nankivell, G. (1998). "Supernova 1998cx in NGC 6209". International Astronomical Union Circular (6970): 1. Bibcode:1998IAUC.6970....1W.
  8. ↑ "SN 1998cx". Transient Name Server. IAU. Retrieved 1 December 2025.
  9. ↑ Pignata, G.; Maza, J.; Hamuy, M.; Antezana, R.; Gonzalez, L.; Gonzalez, P.; Lopez, P.; Silva, S.; Folatelli, G.; Iturra, D.; Cartier, R.; Forster, F.; Marchi, S.; Rojas, A.; Conuel, B.; Reichart, D.; Ivarsen, K.; Crain, A.; Foster, D.; Nysewander, M.; Lacluyze, A. (2009). "Supernova 2009fz in NGC 6209". Central Bureau Electronic Telegrams (1838): 1. Bibcode:2009CBET.1838....1P.
  10. ↑ "SN 2009fz". Transient Name Server. IAU. Retrieved 1 December 2025.