Galaxy in the constellation Cancer
NGC 2804 |
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![](//upload.wikimedia.org/wikipedia/commons/thumb/9/98/NGC_2804_legacy_dr10.jpg/250px-NGC_2804_legacy_dr10.jpg) The lenticular galaxy NGC 2804. |
Observation data (J2000 epoch) |
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Constellation | Cancer |
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Right ascension | 09h 16m 50.0119s[1] |
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Declination | +20° 11′ 54.611″[1] |
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Redshift | 0.027662 [1] |
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Heliocentric radial velocity | 8293 ± 3 km/s[1] |
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Distance | 412.8 ± 28.9 Mly (126.55 ± 8.86 Mpc)[1] |
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Apparent magnitude (V) | 12.8[1] |
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Characteristics |
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Type | S0[1] |
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Size | ~226,100 ly (69.31 kpc) (estimated)[1] |
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Apparent size (V) | 1.4' x 1.2'[1] |
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Other designations |
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2MASX J09165000+2011548, IC 2455, UGC 4901, MCG +03-24-028, PGC 26196, CGCG 091-047[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. 18.5).[4]
See also
- List of NGC objects (2001–3000)
References
- ^ a b c d e f g h i j k "NASA/IPAC Extragalactic Database". Results for NGC 2804. Retrieved 10 August 2024.
- ^ a b Seligman, Courtney. "NGC 2804". Celestial Atlas. Retrieved 10 August 2024.
- ^ "SIMBAD astronomical database". Entry for NGC 2804. Retrieved 10 August 2024.
- ^ "Transient Name Server". Entry for SN 2023ftr. Retrieved 10 August 2024.
External links
Media related to NGC 2804 at Wikimedia Commons - NGC 2804 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images