Photometry of 11 asteroids during their 1998 and 1999 apparitions

Seven composite and five individual lightcurves of 11 asteroids, collected during the last 18 months, are presented. There are no published lightcurves for five of the asteroids so far. The synodic periods of five of them are derived assuming two maxima and two minima per rotational cycle: 170 Maria — 13.14 h; 240 Vanadis — 10.64 h; 347 Pariana — 4.052 h; 351 Yrsa — 13.29 h and 1116 Catriona — 12.06 h. The obtained data for the other one, 275 Sapientia, allowed a low limit of its period to be specified — 20 h. New lightcurves for 19 Fortuna, 21 Lutetia and 93 Minerva, 266 Aline, and 690 Wratislavia are presented.