(51)-NEMAUSA OBSERVED AT NEAR ZERO PHASE-ANGLE

The asteroid (51) Nemausa attained the small solar phase angle 0.64 de grees on 1994 September 24.90 and was observed in Stromgren uvby: at L a Silla between September 25.0 and 27.4 UT, where the phase angle;vari ed from 0.64 degrees to 1.37 degrees and the phase factor in y was fou nd to vary during rotation in the range 0.05 to 0.13 mag/deg. This con firms earlier found variation, but the high values observed here are d ue to the opposition effect. The approximate 11:3 orbital resonance wi th the Earth allows certain identification of minor details by compari ng seven lightcurves separated 5.5 years observed since 1983. (C) 1998 Elsevier Science Ltd. All rights reserved.