| NGC 2804 | |
| Constellation Name: | Cancer |
| Epoch: | J2000 |
| Type: | S0[1] |
| Dist Ly: | NaNMpc |
| Z: | 0.027662 |
| H Radial V: | 8293 ± 3 km/s |
| Appmag V: | 12.8 |
| Size V: | 1.4' x 1.2' |
| Size: | ~69.31kpc (estimated) |
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). 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.
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]