Repetition of the geometric configuration of the nominal orbits for (87887) 2000 SS286 and (415992) 2002 AT49 (no thermal accelerations included in this run; note the logarithmic scale of the abscissa). The top panel shows the mutual distance of the two asteroids, the bottom panel shows their relative velocity. Both functions have deep minima at conjunctions. The first occurs ~7.42 kyr ago, followed by the second at ≃ 257 kyr after completing one synodic cycle of their relative motion. The gray level line at the top shows a distance of 3 R_Hill, while that at the bottom shows V_esc of the parent body.