| NGC 2708 | |
| Constellation Name: | Hydra |
| Epoch: | J2000 |
| Type: | SAB(s)b pec?[1] |
| Dist Ly: | NaNMpc |
| Z: | 0.006698 |
| H Radial V: | 2008 ± 5 km/s |
| Appmag V: | 12.0 |
| Size V: | 2.7' x 1.4' |
| Size: | ~30.29kpc (estimated) |
NGC 2708 is a spiral galaxy in the constellation of Hydra. Its velocity with respect to the cosmic microwave background is 2315 ± 22 km/s, which corresponds to a Hubble distance of 34.15 ± 2.41 Mpc (∼111 million light-years). It was discovered by German-British astronomer William Herschel on 6 January 1785.[2] This galaxy was also observed by British astronomer John Herschel on 12 March 1826, and later listed as NGC 2727.
The SIMBAD database lists NGC 2708 as a Seyfert II galaxy,[3] i.e. a galaxy with a quasar-like nucleus with very high surface brightnesses whose spectra reveal strong, high-ionisation emission lines, but unlike quasars, the host galaxy is clearly detectable.
One supernova has been observed in NGC 2708: SN 2023bee (type Ia, mag. 17.3).[4]
According to A.M. Garcia, NGC 2708 is part of the four member NGC 2708 group (also known as LGG 164). The other three galaxies are: NGC 2695, NGC 2699, and NGC 2706.[5]