Residuals in Dec (first row), RA (second row), and radial velocity (third row) as functions of time, between the 100 simulated orbits in the granular case (full N-body simulations) and the respective best-fit Schwarzschild orbits (f_SP = 1). The first column gives the results considering a population of 20 M_⊙ black holes, the second column 50 M_⊙ black holes, the third 100 M_⊙ black holes. Each of the 100 residual curves is shown in light grey, highlighting their median (solid black line), 68th percentile (red filled area), and 90th percentile (blue filled area).