Family members of Athor (left panel) and Zita (right panel) are presented in proper semi-major axis versus inverse diameter plane. The prograde asteroids are shown as red up-pointing triangles and the retrograde asteroids as blue down-pointing. At the top of each plot the Kernel density estimation (KDE) is presented for both retrograde and prograde rotators along the semi-major axis. In the left panel the faintest markers correspond to halo members.