Example of the orbit of a simulated test particle initiated with a = 25.73 AU. The grey points show the orbit computed during the low-resolution simulation. The particle initially undergoes interactions with β Pic b and reaches a periastron distance of less than 3 AU at some moment in the simulation. Then the resolution of the simulation is increased, resulting in the orbit shown in green. This high-resolution simulation ends when the periastron distance becomes less than 0.4 AU (marked with the green dot).