Orbit bundles divided in the phase space of circularity, λ_z, versus time-averaged radius, R, for Au-23-85-50. The left panel represents bar orbits while the right panel is for orbits from other components, including the bulge, disc, and stellar halo. The probability densities of all orbits within the data coverage (R ≤ 50 arcsec) are normalised to unity, with their values indicated by the colour bar. For each panel, orbits in λ_z–R phase space are divided into different bundles by using the Voronoi binning method, with each bundle containing ≳0.5% of the total orbit weight. The blue asterisks and lines indicate the centres and boundaries of Voronoi bins, respectively.