SYMBOLIC CALCULATIONS IN THE STUDY OF SECULAR PERTURBATIONS IN THE MANY-BODY PROBLEM WITH VARIABLE MASSES

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Abstract

The problem of deriving differential equations determining secular perturbations of orbital elements in a multiplanetary system is considered in the case when the central star loses its mass isotropically, while the masses of the planets can change anisotropically, which leads to the appearance of reactive forces. As a model of a multiplanetary system, the classical problem of variable-mass bodies is used, when bodies move around the central star along quasi-elliptical nonintersecting orbits and interact with each other in accordance with the law of universal gravitation. It is assumed that the masses of the bodies change at different rates and the laws of mass change are considered to be arbitrary given functions of time. Differential equations of motion of bodies in osculating elements of aperiodic motion along quasi-conical orbits corresponding to the planetary Lagrange equations are derived. An algorithm for calculating the perturbing functions in the form of power series in small parameters and the derivation of differential equations determining secular perturbations of orbital elements are discussed. All necessary symbolic calculations are performed using the Wolfram Mathematica computer algebra system.

About the authors

A. N. Prokopenya

Warsaw University of Life Sciences

Email: alexander_prokopenya@sggw.edu.pl
Warsaw, Poland

M. Zh. Minglibayev

Al-Farabi Kazakh National University

Email: minglibayev@gmail.com
Almaty, Kazakhstan

M. R. Saparova

Al-Farabi Kazakh National University

Email: moldir170788@gmail.com
Almaty, Kazakhstan

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