Stability analysis of the dynamically stable orbital solution for the HD 141399 planetary system (planets HD 141399b, c, d, and e from top to bottom). As in Fig. 13, the color scale shows D values between −6 and 2. The red zone corresponds to highly unstable orbits, while the dark blue region can be assumed to be stable on a billion-years timescale. The contour curves indicate the 1, 2, 3, 5, 10σ confidence intervals from Δχ². The minima always lie in a stable region for all four planets in the system.