Posterior parameter distribution of the initial conditions of Jhelum’s best-fit orbit and of the parameters of the Galactic halo potential, for σ_nuis = 6.7 km s⁻¹. We note that here, the bulge and disk were kept fixed and set to be those of the default MW potential. The posterior parameter distribution of the initial conditions resembles the one of the default MW potential shown in Fig. 5. There is a strong degeneracy between M_h and r_s, as expected, and is a result of the circular velocity constraint. The correlation between q_x and q_z is set by the requirement that the halo density be positive.