Astronomy:NGC 2340
| NGC 2340 | |
|---|---|
 NGC 2340 imaged by Pan-STARRS | |
| Observation data (J2000 epoch) | |
| Constellation | Lynx |
| Right ascension | 07h 11m 10.7950s[1] |
| Declination | +50° 10′ 29.075″[1] |
| Redshift | 0.019764±0.0000250[1] |
| Helio radial velocity | 5,925±7 km/s[1] |
| Distance | 315.77 ± 44.34 Mly (96.817 ± 13.596 Mpc)[1] |
| Apparent magnitude (V) | 12.7[1] |
| Characteristics | |
| Type | E[1] |
| Size | ~263,000 ly (80.64 kpc) (estimated)[1] |
| Apparent size (V) | 1.8′ × 1.2′[1] |
| Other designations | |
| UGC 3720, MCG+08-13-096, PGC 20338[1] | |
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).[1] However, six non-redshift measurements give a farther mean distance of 315.77 ± 44.34 Mly (96.817 ± 13.596 Mpc).[2] It was discovered by German-British astronomer William Herschel on 9 February 1788.[3]
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.[4][5]
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.[6]
Supernova
One supernova has been observed in NGC 2340:
- SN 2025hlm (Type Ia-91bg-like, mag. 19.7586) was discovered by the Zwicky Transient Facility on 16 April 2025.[7]
See also
References
- ↑ 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 2340". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+2340.
- ↑ "Distance Results for NGC 2340". NASA. https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+2340.
- ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 2340". https://cseligman.com/text/atlas/ngc23.htm#2340.
- ↑ 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.
- ↑ "NGC 2340". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+2340.
- ↑ "ACO 569". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=ACO+569.
- ↑ "SN 2025hlm". IAU. https://www.wis-tns.org/object/2025hlm.
External links
- NGC 2340 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
Coordinates: 
07h 11m 10.7950s, +50° 10′ 29.075″
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