d="p0170">A dynamical mechanism to disperse ancient main asteroid belt families is proposed.
dd><dt class="label">•dt><dd>d="p0175">Most of the dispersions occur during the instability phase of a 5 giant planet model.
dd><dt class="label">•dt><dd>d="p0180">(a; ecc, I) are displaced by close encounters; mean motion and/or secular resonances.
dd>dl>