The diameter, shape, albedo, and rotation of 47 Aglaja

Observations of the September 16, 1984 occultation of SAO 146599 by the C-type asteroid 47 Aglaja from 13 sites in the continental U.S. have yielded a diameter of 136.4 + or - 1.2 km, leading to the calculation of a rotational period of 13.2 + or - 0.01 hr. At the time of the occultation, the zero-phase-angle visual geometric albedo of the asteroid's phase was 0.071 + or - 0.002. It is suggested that a substantial portion of the object's mean brightness variation with ecliptic longitude is ascribable to albedo differences over its surface.