Variation of Galactocentric distance versus median eccentricity (〈R_g〉-〈R_b〉 × 〈e〉) across stellar groups, arranged in descending order of median metallicity 〈[Fe/H]〉. The range of eccentricity (〈e〉) on the x-axis remains consistent across all subplots, while the y-axis retains an unconstrained scale, enhancing the visualisation of the pronounced 〈R_g〉-〈R_b〉 dispersion. Corresponding to Fig. 12, a horizontal dashed line is positioned at 〈R_g〉-〈R_b〉 = 0 to accentuate the region where Galactocentric distances coincide. To illuminate the 2D distribution of stars within the designated parameter space, 2D-Gaussian kernel densities are overlaid upon the scatter markers. Consistent with prior visuals, the colours in this figure maintain the same scheme.