Pole Orientation and Shape of 12 Asteroids

We present the results of photometric observations of 12 asteroids, performed from 1985 through 1989 at the Astronomical Observatory of Teramo (Italy), Astronomical Observatory of Turin (Italy), and European Southern Observatory (ESO, La Silla, Chile). Using the EA pole determination method described in G. De Angelis ( Planet. Space Sci. , 41, 285-290, 1993), we have obtained the first spin and shape solution of 85 to and 360 Carlova and an improvement of the previous determinations for 12 Victoria, 192 Nausikaa and 423 Diotima, for which we determined for the first time the sidereal period and the sense of rotation. We have checked the determinations obtained by other authors for the asteroids 3 Juno, 6 Hebe, 20 Massalia, 43 Ariadne, and 52 Europa, and suggested a very rough estimate of the spin and shape parameters of 115 Thyra.