Geological Chronicle
Erro is a lunar impact crater that lies beyond the eastern limb of the Moon, on the far side as seen from the Earth. The formation spans an official diameter of 63.75 kilometers.
It lies along the eastern fringes of the uneven plain that joins Mare Marginis to the northwest with Mare Smythii to the west-southwest. It is recorded in the IAU Gazetteer under quadrangle LAC-64.