Temporal evolution of selected osculating orbital elements of a model, starting from the best-fit Keplerian parameters of Table 2. The first 3050 yr of the greater than 10⁸ yr lifetime are displayed. The left-hand panels show the eccentricities and arguments of periapse for the motion of the center of mass of the binary, the top righthand panel shows the resonant angle Θ₁, and the bottom righthand panel the minimum separation between the two planets for successive orbits of the inner planet.