NGC 4189
NGC 4189 is an intermediate spiral galaxy in the constellation of Coma Berenices. Its velocity with respect to the cosmic microwave background is, which corresponds to a Hubble distance of. However, 20 non-redshift measurements give a closer mean distance of. It was discovered by German-British astronomer William Herschel on 8 April 1784. It was also observed by German astronomer Friedrich [Karl Arnold Schwassmann|Arnold Schwassmann] on 16 November 1900, and added to the Index Catalogue as IC 3050.
NGC 4189 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.