Linear radii and masses of 142 asteroids, constituting 77 different pairs, closely approaching each other during proximity, are estimated. The estimate was effected by way of the known absolute magnitudes of the asteroids and their relations with the radii and geometric albedos. The results are presented in two variants: the one bearing upon the dark (carbonaceous type) asteroids and the other upon the light (silicaceous type) ones. Mean values of albedo and density were employed: 0.04 and 2.6 g $cm^{-3}$ for the dark, and 0.15 and 3.5 g $cm^{-3}$ for the light asteroids.