Known binary systems in the Solar System, including asteroids and KBOs. “Low spin” and “High spin” objects indicated by stars and triangles, respectively, are those that have been considered in this study (objects with D < 15 km and a < 2.502 au). “High spin” objects have a primary rotation period of less than 4 h, and “Low spin” objects have primary rotation periods of greater than 4 h. The diameters of objects that are not included in the study are indicated by marker size and separated into three sets of d_p > 50 km, 50 km > d_p > 15 km, and d_p < 15 km. Diameters d_s, d_p, and the system semi-major a are in kilometers (km).