NGC 1217

NGC 1217
NGC 1217 (center) imaged by Legacy Surveys. The galaxy above is MCG -07-07-004 [d].
Observation data (J2000 epoch)
ConstellationFornax
Right ascension03h 06m 06.0421s
Declination−39° 02′ 10.833″
Redshift0.021358±0.0000400
Heliocentric radial velocity6,403±12 km/s
Distance199.93 Mly (61.300 Mpc)
Apparent magnitude (V)13.64
Characteristics
Type(R)SA(r)a
Apparent size (V)1.8′ × 1.3′
Other designations
ESO 300- G 010, IRAS 03041-3913, 2MASX J03060599-3902111, MCG -07-07-003, PGC 11641

NGC 1217 is a spiral galaxy in the constellation of Fornax. Its velocity with respect to the cosmic microwave background is 6,282±15 km/s, which corresponds to a Hubble distance of 302.2 ± 21.2 Mly (92.66 ± 6.49 Mpc). Additionally, one non-redshift measurement provides a much closer distance estimate of 199.93 Mly (61.300 Mpc). It was discovered by British astronomer John Herschel on 23 October 1835.

NGC 1217 has an 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.

NGC 1217 is also 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. It is also a LINER galaxy, i.e. a galaxy whose nucleus has an emission spectrum characterized by broad lines of weakly ionized atoms.

Supernova

One supernova has been observed in NGC 1217:

See also

References

  1. 1 2 3 4 5 6 7 8 9 10 11 "Results for object NGC 1217". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 12 December 2025.
  2. ↑ "Distance Results for NGC 1217". NASA/IPAC Extragalactic Database. NASA. Retrieved 12 December 2025.
  3. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 1217". Celestial Atlas. Retrieved 12 December 2025.
  4. ↑ 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.
  5. 1 2 "NGC 1217". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 11 December 2025.
  6. ↑ 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.
  7. ↑ "SN 2025ygq". Transient Name Server. IAU. Retrieved 12 December 2025.