NGC 2340

NGC 2340
NGC 2340 imaged by Pan-STARRS
Observation data (J2000 epoch)
ConstellationLynx
Right ascension07h 11m 10.7950s
Declination+50° 10′ 29.075″
Redshift0.019764±0.0000250
Heliocentric radial velocity5,925±7 km/s
Distance315.77 ± 44.34 Mly (96.817 ± 13.596 Mpc)
Apparent magnitude (V)12.7
Characteristics
TypeE
Size~263,000 ly (80.64 kpc) (estimated)
Apparent size (V)1.8′ × 1.2′
Other designations
2MASX J07111080+5010288, UGC 3720, MCG +08-13-096, PGC 20338, CGCG 234-091

NGC 2340 is a large elliptical galaxy in the constellation of Lynx. Its velocity with respect to the cosmic microwave background is 6,008±9 km/s, which corresponds to a Hubble distance of 289.0 ± 20.3 Mly (88.61 ± 6.21 Mpc). However, six non-redshift measurements give a farther mean distance of 315.77 ± 44.34 Mly (96.817 ± 13.596 Mpc). It was discovered by German-British astronomer William Herschel on 9 February 1788.

NGC 2340 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.

Abell 569 member

NGC 2340 is a member of the Abell 569 galaxy cluster, which contains 85 galaxies, the brightest of which is NGC 2329 [fr].

Supernova

One supernova has been observed in NGC 2340:

See also

References

  1. 1 2 3 4 5 6 7 8 9 10 11 "Results for object NGC 2340". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 1 January 2026.
  2. ↑ "Distance Results for NGC 2340". NASA/IPAC Extragalactic Database. NASA. Retrieved 1 January 2026.
  3. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 2340". Celestial Atlas. Retrieved 1 January 2026.
  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. ↑ "NGC 2340". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 1 January 2026.
  6. ↑ "ACO 569". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 1 January 2026.
  7. ↑ "SN 2025hlm". Transient Name Server. IAU. Retrieved 1 January 2026.