1973 EC. Discovered 1973 Mar. 13 by J. Gibson at El Leoncito.

Anteros was in attendance upon Eros and was sometimes said to be the avenger of slighted love, sometimes the one who opposes love, and was said by other authorities to be the twin brother of Eros. Although briefly used for the minor planet {(2101)} Adonis shortly after its discovery, the name is particularly suitable for (1943) because of the similarity of its orbit to that of (433) Eros. (M 4237)

Name proposed by M.-A. Combes.