Physical studies of asteroids IX: The light curve of the M asteroid 77 Frigga

The results of photoelectricUBV observations of asteroid 77 Frigga during the 1982 opposition are presented. From eight nights of observations at phase angles smaller than 2_o^.8 a synodic period of 0_d^.3755±0_d^.0006 is derived. The light curve appears very symmetric with two maxima per period and an amplitude of 0_m^.19. The primary maximum corresponds toV(0^o)=8_m^.58, and the colour indices are:B–V = 0_.^m738 ± 0_.^m003 andU–B = 0_.^m200 ± 0_.^m002.