Astrometry and Orbits of Asteroids
Astrometry of asteroids and comets are necessary for reliable orbit calculations. For several years positions of asteroids and comets have been obtained with the ESO Schmidt telescope but also with the Kvistaberg Schmidt telescope and with the Schmidt telescope at the Uppsala Southern Station at Siding Spring Observatory. During 1992-1993 the Uppsala-ESO Survey of Asteroids and Comets (UESAC) was carried out and in August-September 1995 a similar survey was made with the ESO Schmidt telescope. During the autumn 1996 the Uppsala-DLR Survey of Trojan asteroids was initiated with observations at ESO.