LIGHTCURVES AND ROTATIONAL PERIODS OF MAIN BELT ASTEROIDS .3.

In the framework of the collaborative program between the Astronomy In stitute of Catania University and the Torino Astronomical Observatory to collect new photometric lightcurves of main-belt asteroids, six new objects were observed. The B and V photoelectric observations were ca rried out at Serra la Nave stellar station of Catania Astrophysical Ob servatory during June and August 1992 and April, May and November 1993 . The observed asteroids and their reliable determined synodic rotatio nal periods are: 238 Hypatia (P = 8.(h)84+/-0.(h)01), 371 Bohemia (P=1 2.(h)48+/-0.(h)01), 411 Xanthe (P=7.(h)48+/-0.(h)01), 419 Aurelia (P=1 6.(h)63+/-0.(h)01), 665 Sabine (P=3.(h)932+/-0.(h)008), 914 Palisana ( P=15.(h)62+/-0.(h)01). No large modulation of the B - V color is in ge neral evident for all the observed objects.