[]{data-label="sres00"}](sres00b.eps){width="\columnwidth"}  ![A simulation of the Titan-Iapetus 0:0 MMR using [ssimpl]{}, with tidal evolution accelerated 00x. The bottom panel plots the secular resonant argument $\varpi_I-\varpi_J+\Omega_I-\Omega_{eq}$. In this run, Iapetus 