Study of the Structure of Orbital Perturbations of Near-Earth Asteroids Approaching Jupiter

Abstract

This paper is devoted to the study of the structure of orbital perturbations for the previously identified 1408 asteroids approaching the Earth and Jupiter. The results showed that when predicting the motion of the asteroids being studied, it is necessary to take into account the gravitational influence of the planets, the Moon, Ceres, Pallas and Vesta, the relativistic effects of the Sun and the oblateness of the Sun. Radiation pressure has a significant effect on the motion of approximately half of the asteroids with known physical parameters. Evaluation of the influence of the Yarkovsky effect on the motion of objects with a known parameter A₂ showed that this disturbance is significant and requires consideration when studying the motion of these asteroids. For 1404 objects we obtained numerical estimates of the parameter A₂, performed using an automatic procedure implemented in the IDA software package. The estimates obtained can be divided into two groups: 71% of asteroids have an observation arc of less than 300 days, for them the estimate of A₂ most often is overstated. The objects of the second group are characterized by a well-defined orbit, the values of the parameter A₂ obtained for them correspond to analytical estimates.