Relation between P_min and kd for 169 asteroids.The B-type objects are indicated with red squares, C-type with red circles, Cb-type with red triangles, Ch-type with red inverted triangles, L-type with blue squares, Ld-type with blue circles, K-type withblue triangles, T-type with blue inverted triangles, X-type with green squares, Xc-type with green circles, Xe-type with green triangles, Xk-type with green inverted triangles, S-type with yellow squares, Sa-type with yellow circles, Sk-type with yellow triangles, Sl-type with yellow inverted triangles, A-type with black squares, R-type with black circles, V-type with black triangles, the Barbarians with black inverted triangles, and those objects without taxonomic type in the Bus taxonomy with black stars.