Astronomy:NGC 2115
| NGC 2115 | |
|---|---|
| File:NGC 2115 legacy dr10.jpg NGC 2115 (center) with PGC 18002 (below and to left of center) imaged by Legacy Surveys | |
| Observation data (J2000 epoch) | |
| Constellation | Pictor |
| Right ascension | 05h 51m 19.8104s[1] |
| Declination | −50° 34′ 58.304″[1] |
| Redshift | 0.023389±0.0000730[1] |
| Helio radial velocity | 7,012±22 km/s[1] |
| Distance | 340.9 ± 23.9 Mly (104.52 ± 7.33 Mpc)[1] |
| Apparent magnitude (V) | 14.15[1] |
| Characteristics | |
| Type | S0+? pec[1] |
| Size | ~229,500 ly (70.35 kpc) (estimated)[1] |
| Apparent size (V) | 1.1′ × 0.5′[1] |
| Other designations | |
| ESO 205- G 006 NED01, PGC 18001[1] | |
NGC 2115 is a large lenticular galaxy in the constellation of Pictor. Its velocity with respect to the cosmic microwave background is 7,087±23 km/s, which corresponds to a Hubble distance of 340.9 ± 23.9 Mly (104.52 ± 7.33 Mpc).[1] It was discovered by British astronomer John Herschel on 4 January 1837.[2]
Pair of interacting galaxies
The apparent magnitude of PGC 18002, the galaxy further south, is 15.1 and was certainly not observed by Herschel.[2] The radial velocities of these two galaxies are almost equal, so they are at the same distance from us and, judging by their shape, they are in gravitational interaction.[2]
Identification
In the NASA/IPAC Extragalactic Database, NGC 2115 appears as a pair of galaxies. To view the data for NGC 2115, it must be identified as NGC 2115A or PGC 18001.[1] The other galaxy in the pair is identified in this database as NGC 2115B, which is PGC 18002.[3] [Note: This can cause confusion, as other databases, such as SIMBAD, identify PGC 18002 as NGC 2115A.][4]
Supernova
One supernova has been observed in NGC 2115:
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 1.11 "Results for object NGC 2115A". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+2115A.
- ↑ 2.0 2.1 2.2 Seligman, Courtney. "New General Catalogue Objects: NGC 2115". https://cseligman.com/text/atlas/ngc21.htm#2115.
- ↑ "Results for object NGC 2115B". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+2115B.
- ↑ "NGC 2115A". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+2115A.
- ↑ "SN 2021clw". IAU. https://www.wis-tns.org/object/2021clw.
External links
- NGC 2115 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
Coordinates: 
05h 51m 19.8104s, −50° 34′ 58.304″
 |  |
