1989 NX. Discovered 1989 July 8 by C. S. Shoemaker and E. M. Shoemaker at Palomar.

Named in honor of David J. Stevenson (1948– ) of the California Institute of Technology. A citizen of New Zealand, Stevenson displays scientific breadth and depth to an unusual degree; his research interests span much of theoretical geophysics and planetary science. Stevenson’s contributions include novel insights into our understanding of planetary interiors and the origin of planetary magnetic fields. (M 27459)

Citation provided by P. M. Goldreich following a suggestion by the discoverers and A. W. Harris.