土卫八的木星摄动

The Perturbation of Iapetus due to Jupiter

采用半分析半数值法求出木星对土卫八摄动的长期解及长周期解，从而能对木星的摄动给出较准确的量级估计．

A semi-numerical and send-analytical method was presented to investigate the Iapetus's perturbation due to Jupiter in this paper. Analytical method is adopted to obtain disturbing function. and numerical method is used to Fed the solution of this system.A spectral technique was used to reconstruct the andyticity from the discrete solution given by the numerial integration of the seculer terms and long period inequalities.The results are similar to those of Duriez & Vienne's and confirm that the perturbing influence due to Jupiter has a perceptible effect on the motion of Iapetus.