Orbital evolution of some representative TNOs near the 3/1 resonance over 100 Myr. We show the semi-major axis, the eccentricity, the inclination, the resonant angle σ₀, and the argument of the pericentre (from top to bottom). The initial conditions are taken from Table 1 and we take into account the perturbations from the four giant planets. We show the barycentric osculating orbital elements.