Lightcurves and phase relation of asteroid 324 Bamberga

Abstract A worldwide photometric investigation of the asteroid 324 Bamberga was conducted during the period September–November 1978. The full-cycle lightcurve shows two maxima and two minima with a maximum amplitude of 0.075 mag; the rotation period was found to be P syn = 29. h 42 ± 0. h 01. A linear least-squares solution of the phase relation gives β y = (0.334 ± 0.001) mag/degree and V 0 (1, 0) = (7.17 ± 0.01) mag. The color indices measured are B - V = 0.69, U - B =0.36, in agreement with the C taxonomic type given for 324 Bamberga. The very long period indicates 324 Bamberga is an unusual object among asteroids with diameters greater than 200 km.