Pole and shape determinaton of asteroids. II

To update the research work on asteroids to obtain their rotation axis orie ntation and axes ratios, we went on implementing the collection of lightcur ves. By means of new observations carried out and new lightcurves published , we were able to apply the computation methods of the rotation parameters to 18 minor planets. The found values of the pole coordinates and of the ax es ratios are reported. For 14 objects, this is the first determination of these elements which are necessary to study the collisional evolution of th e asteroids. (C) 2000 Elsevier Science Ltd. All rights reserved.