Herschel (Mimas)

Named after William Herschel - German-British astronomer; discovered Mimas and Enceladus (1738-1822).

Herschel /ˈhɜːrʃəl/ is a huge crater in the leading hemisphere of the Saturnian moon Mimas, on the equator at 100° longitude. It is so large that astronomers have expressed surprise that Mimas was not shattered by the impact that caused it. It measures 139 kilometres across, almost one third the diameter of Mimas. (wikipedia entry)

A crater is a circular depression likely created by an impact event. On Mimas they are named after people from Malory's Le Morte d'Arthur legends (Baines translation), also one crater named for the discoverer of Mimas.