The same as Figure 1 but for two additional mass models with larger triaxiality: (left) triaxiality parameter T = 0.25, (luminosity averaged) shape parameters (u, p, q) = (0.96, 0.95, 0.77), and viewing angles (θ, ϕ, ψ) = (67.°62, −28.°38, 86.°61); and (right) T = 0.75, (u, p, q) = (0.96, 0.85, 0.79), and (θ, ϕ, ψ) = (48.°74, −51.°33, 67.°15). The diagonal black line in each panel represents the angle η given in Equation (2). As in Figure 1, this angle approximates the boundary separating long-axis (red symbols) and short-axis (black symbols) tube orbits in the x–z start space.