Strömgren photometry of 40 Harmonia, 45 Eugenia and 52 Europa

The Asteroids 40 Harmonia, 45 Eugenia and 52 Europa have been studied photometrically. From their lightcurves synodic periods of 8h54m36s, 5h42m00s and 5h37m46s, and maximum amplitudes of 0m.15, 0m.12 and 0m.20, have been deduced for 40 Harmonia, 45 Eugenia and 52 Europa, respectively. Improved solutions for the sense of rotation, sidereal period, pole orientation and shape properties are proposed.