Dynamical age distribution of the bona fide β Pic members, obtained with the robust estimate of the covariance matrix. The distribution obtained with the S_TCM size estimator is colour-coded with the 68%, 95%, and 99.7% highest-density intervals. The distribution obtained with the S_DCM size estimator is shown in dashed lines and the same highest density intervals are shown. The orbits were integrated using the new A&S potential and we computed 1000 bootstrap repetitions.