Belt two-body drift vs JPL Horizons, heliocentric longitude, degrees (sampled named asteroids)
1900  n=40  median 5.20  90% 37.43  max 109.81
1950  n=40  median 3.18  90% 9.61  max 75.61
2000  n=40  median 0.95  90% 3.53  max 4.47
2026  n=40  median 0.03  90% 0.08  max 0.13
2050  n=40  median 0.60  90% 2.89  max 6.05
2100  n=40  median 2.52  90% 6.41  max 48.95
2150  n=40  median 4.38  90% 29.55  max 52.62