Astronomy:NGC 2804
| NGC 2804 | |
|---|---|
 NGC 2804 imaged by Legacy Surveys | |
| Observation data (J2000 epoch) | |
| Constellation | Cancer |
| Right ascension | 09h 16m 50.0173s[1] |
| Declination | +20° 11′ 54.631″[1] |
| Redshift | 0.027662[1] |
| Helio radial velocity | 8293 ± 3 km/s[1] |
| Distance | 412.8 ± 28.9 Mly (126.55 ± 8.86 Mpc)[1] |
| Apparent magnitude (V) | 12.8[1] |
| Characteristics | |
| Type | S0[1] |
| Size | ~226,100 ly (69.31 kpc) (estimated)[1] |
| Apparent size (V) | 1.4′ × 1.2′[1] |
| Other designations | |
| IC 2455, UGC 4901, MCG+03-24-028, PGC 26196[1] | |
NGC 2804 is a lenticular galaxy in the constellation of Cancer. Its velocity with respect to the cosmic microwave background is 8580 ± 20 km/s, which corresponds to a Hubble distance of 126.55 ± 8.86 Mpc (~413 million light-years).[1] It was discovered by British astronomer John Herschel on 24 February 1827.[2] This galaxy was also observed by the French astronomer Stéphane Javelle on 9 April 1896, and was later added to the Index Catalogue as IC 2455.[2]
According to the SIMBAD database, NGC 2804 is a LINER galaxy, i.e. a galaxy whose nucleus has an emission spectrum characterized by broad lines of weakly ionized atoms.[3]
One supernova has been observed in NGC 2804: SN 2023ftr (Type Ia, mag. 18.51) was discovered by the Zwicky Transient Facility on 16 April 2023.[4]
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 2804". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+2804.
- ↑ 2.0 2.1 Seligman, Courtney. "NGC 2804". https://cseligman.com/text/atlas/ngc28.htm#2804.
- ↑ "NGC 2804". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+2804.
- ↑ "SN 2023ftr". IAU. https://www.wis-tns.org/object/2023ftr.
External links
- NGC 2804 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
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