NGC 3977 is an unbarred spiral galaxy in the constellation of Ursa Major. Its velocity with respect to the cosmic microwave background is 5,975±13 km/s, which corresponds to a Hubble distance of 287.4 ± 20.1 Mly (88.13 ± 6.17 Mpc). It was discovered by German-British astronomer William Herschel on 13 April 1784. It was also observed by Lewis Swift on 16 April 1885, causing this galaxy to be listed twice in the New General Catalogue, as both NGC 3977 and NGC 3980.
