Astronomy:NGC 1217

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NGC 1217
NGC 1217 (center) imaged by Legacy Surveys. The galaxy above is MCG -07-07-004.
Observation data (J2000 epoch)
ConstellationFornax
Right ascension 03h 06m 06.0421s[1]
Declination−39° 02′ 10.833″[1]
Redshift0.021358±0.0000400[1]
Helio 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, 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. ↑ 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 1217". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+1217. 
  2. ↑ "Distance Results for NGC 1217". NASA. https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+1217. 
  3. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 1217". https://cseligman.com/text/atlas/ngc12.htm#1217. 
  4. ↑ Asmus, D.; Greenwell, C. L.; Gandhi, P.; Boorman, P. G.; Aird, J.; Alexander, D. M.; Assef, R. J.; Baldi, R. D. et al. (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. doi:10.1093/mnras/staa766. Bibcode: 2020MNRAS.494.1784A. 
  5. ↑ 5.0 5.1 "NGC 1217". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+1217. 
  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. doi:10.3847/1538-4365/ac4157. Bibcode: 2022ApJS..258...29C. 
  7. ↑ "SN 2025ygq". IAU. https://www.wis-tns.org/object/2025ygq. 

Coordinates: Sky map 03h 06m 06.0421s, −39° 02′ 10.833″



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