| NGC 7769 | |
| Constellation Name: | Pegasus |
| Epoch: | J2000 |
| Type: | (R)SA(rs)b[1] |
| Dist Ly: | NaNMpc |
| Z: | 0.014046 |
| H Radial V: | 6580 ± 10 km/s |
| Appmag V: | 12.0 |
| Size V: | 3.2' x 2.7' |
| Size: | ~54.14kpc (estimated) |
NGC 7769 is a spiral galaxy in the constellation of Pegasus. Its velocity with respect to the cosmic microwave background is 3855 ± 25 km/s, which corresponds to a Hubble distance of 56.85 ± 4.00 Mpc (∼185 million light-years). It was discovered by German-British astronomer William Herschel on 18 September 1784.[2]
Together with NGC 7770 and NGC 7771, it forms the galaxy trio Holm 820 and is considered part of the four-member Lyons Groups of Galaxies LGG 483, also known as the NGC 7771 Group.[3]
NGC 7769 is a LINER galaxy, i.e. it has a type of nucleus that is defined by its spectral line emission which has weakly ionized or neutral atoms, while the spectral line emission from strongly ionized atoms is relatively weak.
Two supernovae have been observed in NGC 7769: SN 2019iex (type II, mag. 17.6)[4] and SN 2024grb (type II, mag. 18.2).[5]