L2 escape e-folding time
= L2 escape e-folding time
{c}
{title2=$\tau=[n_{\rm bin}\sqrt{1+2\sqrt7}]^{-1}$}
For a small secondary-to-primary mass ratio, the unstable exponent at the outer collinear equilibrium is $n_{\rm bin}\sqrt{1+2\sqrt7}$. Its inverse is approximately $0.0634$ binary periods. Reaching a finite target distance takes this time multiplied by the logarithm of the ratio of final to initial unstable amplitudes.