Parameter surfaces of r_t/r_J and Δr_t/r_t as a function of Galactic coordinates for a fit of King (1962) models to to projections on the sky of a simulated model at different positions on its theoretical orbit. We used a squeezed Hammer-Aitoff projection. The time is T₄ = 1.31 Gyr. The color denotes the value of r_t/r_J (and Δr_t/r_t, bottom plot) on a linear scale. The upper plots shows the parameter surface for the 400 brightest stars in the simulated cluster (data courtesy of Beuria). The middle and bottom plots show the result of the bootstrap analysis (for explanations see the text). The middle plot shows the mean value of r_t/r_J averaged over 100 small-number samples. The bottom plot shows the corresponding relative standard deviation Δr_t/r_t.