Ameghino is a lunar impact crater located to the north of the Sinus Successus , a bay in the northeast part of Mare Fecunditatis. Less than 15 kilometers to the nortwest of Ameghino crater was the landing site of the Soviet Luna 18 and Luna 20 probes.
This formation was designated Apollonius C before being given a name by the IAU. Apollonius crater is located to the east-northeast.