Named in honor of Harold Levison (1959– ) of the Boulder, Colorado, office of the Southwest Research Institute. Since 1988 Levison has, in collaboration with Martin Duncan {see planet  (6115)}, virtually revolutionized our view of the dynamics of short-period comets. The work uses sophisticated numerical models of test particles perturbed by the planets, and it has revealed important details about the Kuiper {see planet  (1776)} Belt, Centaurs, Pluto-Charon and short-period comets. Levison has also contributed revealing insights into the dynamics of perturbers in the β Pictoris system and was a leading member of the team that used Hubble Space Telescope to discover possible observational evidence for small comets in the transneptunian region. (M 27463) _ _.