An explicit symplectic integrator for cometary orbits

被引：10

作者：

Emel'yanenko, V ^{[1
]}

机构：

[1] S Ural Univ, Dept Theoret Mech, Chelyabinsk 454080, Russia

来源：

CELESTIAL MECHANICS & DYNAMICAL ASTRONOMY | 2002年 / 84卷 / 04期

基金：

俄罗斯基础研究基金会;

关键词：

high eccentricities; close encounters; symplectic integration;

D O I：

10.1023/A:1021125829276

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A new symplectic algorithm is developed for cometary orbit integrations. The integrator can handle both high-eccentricity orbits and close encounters with planets. The method is based on time transformations for Hamiltonians separated into Keplerian and perturbation parts. The adaptive time-step of this algorithm depends on the distance from a centre and the magnitude of perturbations. The explicit leapfrog technique is simple and efficient.

引用

页码：331 / 341

页数：11

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