Resonant periodic orbits on the R–p_R plane (top row) and z–V_z plane (bottom row). The initial conditions were chosen along the Sun’s L_z-level, while z = 0 and V_z = 20 km s⁻¹. Column a: The 2/1 resonant orbit with e = 0.45 (red dots on the Poincaré maps in Figs. 3 and 5). Column b: The 4/1 resonant orbit with e = 0.72 (cyan dots in Figs. 3 and 5). Column c: The 6/1 resonant orbit with e = 1.01 (green dots in Fig. 5). Column d: The 1/1 resonant orbit with e = 0.802 (black dot in Fig. 5).