The dependence between ΔP and Δφ. The red circle represents the best-fit values for the original dataset, with the spin pole of Didymos fixed in the direction of the orbital pole of Dimorphos. Blue points are based on bootstrap samples. When the spin axis direction is optimized, the best-fit solution for ΔP and Δφ moves to values represented by the red triangle. Bootstrap samples with free pole direction are shown as green triangles.