Top: Lifetime colormap plots in the (a) e_b, e_c and (b) P_b, P_c planes for 5838 Keplerian models (99 stable) within the 90% confidence level of χ_ν, best² as they resulted from optimization Run 1 for dataset A. Bottom: Same as top but for 5838 Newtonian models (74 stable). The color coding displays the range of lifetimes from white to dark blue, while the orange and green crosses correspond to the positions of the minimum- and maximum-reduced chi-square value of the stable configurations. The best-fitting curve to the data is identified by the red cross, which is unstable in all cases. The MMR solutions have been labeled in the P_b, P_c plane for the nominal P_b = 7 yr.