Histogram distributions of argument of perihelion (top left panel), longitude of ascending node (top right panel), perihelion longitude (bottom left panel), and inclination (bottom right panel) inferred from the well-determined orbits of TNOS and Centaurs fulfilling the criteria 100 <a< 1500 au, q< 35 au (colour histograms). The distributions inferred from all well-determined orbits of ETNOs (150 <a< 1500 au, q> 30 au) are indicated as dashed bars.