Map of secular resonances in the (a, i₀)-plane for a between 0.5 and 3 au, for different values of proper eccentricity, e₀. The left column shows the locations of v_j, j = 2, 3, 4, 5, 6, while the right column shows the locations of , j = 2, 3, 4, 6. The color code of each resonance is indicated by the legend in the top row panels. From top to the bottom: rows correspond to values of e₀ equal to 0.1, 0.2, 0.4, and 0.6, respectively. We also report the location of the Kozai librators in grey, identified by ɡ − s = 0.