NGC 1217

NGC 1217
NGC 1217 (center) imaged by Legacy Surveys. The galaxy above is MCG -07-07-004.
Observation data (J2000 epoch)
ConstellationFornax
Right ascension03h 06m 06.0421s[1]
Declination−39° 02′ 10.833″[1]
Redshift0.021358±0.0000400[1]
Heliocentric radial velocity6,403±12 km/s[1]
Distance199.93 Mly (61.300 Mpc)[1]
Apparent magnitude (V)13.64[1]
Characteristics
Type(R)SA(r)a[1]
Apparent size (V)1.8′ × 1.3′[1]
Other designations
ESO 300- G 010, IRAS 03041-3913, 2MASX J03060599-3902111, MCG -07-07-003, PGC 11641[1]

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).[1] Additionally, one non-redshift measurement provides a much closer distance estimate of 199.93 Mly (61.300 Mpc).[2] It was discovered by British astronomer John Herschel on 23 October 1835.[3]

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.[4][5]

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.[5][6] It is also a LINER galaxy, i.e. a galaxy whose nucleus has an emission spectrum characterized by broad lines of weakly ionized atoms.[1]

Supernova

One supernova has been observed in NGC 1217:

  • SN 2025ygq (Type Ia, mag. 18.483) was discovered by ATLAS on 22 September 2025.[7]

See also

References

  1. ^ a b c d e f g h i j k "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. ^ a b "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.
  • Media related to NGC 1217 at Wikimedia Commons
  • NGC 1217 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images


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