NGC 818
NGC 818 is an intermediate spiral galaxy in the constellation of Andromeda. Its velocity with respect to the cosmic microwave background is, which corresponds to a Hubble distance of. Additionally, 14 non-redshift measurements give a closer mean distance of. It was discovered by German-British astronomer William Herschel on 18 October 1786.
NGC 818 has a possible active galactic nucleus, i.e. it has a compact region at the center of a galaxy that emits a significant amount of energy across the electromagnetic spectrum, with characteristics indicating that this luminosity is not produced by the stars.