1943 ANTEROS: A POSSIBLE NEAR-EARTH BINARY ASTEROID.

A collaboration of two observers at widely-separated longitudes made CCD photometric observations of the near-Earth asteroid (NEA) 1943 Anteros from 2016 August to October. Analysis of the data led to the possibility that the asteroid is a binary with P 1 = 2.86923 ± 0.00006 h, A 1 = 0.07 mag and P ORB = 23.548 ± 0.002 h, A 2 = 0.05-0.10 mag. The estimated effective diameter ratio is Ds/Dp ≥ 0.22 ± 0.02.