Purple: the increase of Naiad’s inclination as a function of its semimajor axis in a 3 × 10⁵ yr simulation that included only Naiad and Thalassa, starting from the present day, and using Q/k₂ = 33 for Neptune (i.e., it was accelerated by at least a factor of 1000). Green: a simple approximation of this dependence as ﹩i=7\mathop{.}\limits^{\unicode{x000b0}}195\sqrt{2.378-a}﹩.