| 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]
NGC 7769, together with NGC 7770 and NGC 7771, forms the galaxy trio Holm 820.[3] It also is listed as part of the five-member group LGG 483, also known as the NGC 7771 Group, which contains the 3 galaxies from Holm 820, NGC 7786, and UGC 12828.[4]
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)[5] and SN 2024grb (type II, mag. 18.2).[6]