THE USE OF RADAR OBSERVATIONS OF NEAR-EARTH AND MAIN BELT MINOR PLANETS FOR DIFFERENT ASTROMETRICAL PURPOSES

摘要

During last decades very deep changes took place in traditional investigations of asteroids, connected with new methods of their observations, such as CCD, radar observations of NEAs and minor planets of main belt. In this paper about 17000 optical and radar observations of 34 NEAs and main belt minor planets have been used to obtain the precise asteroid orbits, FK5 catalogue orientation parameters and the motion of the dynamical equinox from 1750 till 2000 in the Hipparcos system. The problem of the use of radar observations with optical ones for asteroid mass determination is discussed. The attempt to evaluate numerically the orbit displacement due to the direct solar radiation forces was touched slightly.