| NGC 2804 | |
|---|---|
 The lenticular galaxy NGC 2804. | |
| Observation data (J2000 epoch) | |
| Constellation | Cancer |
| Right ascension | 09h 16m 50.0119s[1] |
| Declination | +20° 11′ 54.611″[1] |
| Redshift | 0.027662 [1] |
| Heliocentric 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' x 1.2'[1] |
| Other designations | |
| 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]
- ^ 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.