半长径

对N体问题的数值积分中的Runge-Kutta-Fehlberg法（简称RKF法）、辛算法和厄米算法在N体问题中应用时引起的能量误差、半长径和偏心率的变化进行比较。

The Runge-Kutta-Fehlberg algorithm ( RKF ), the symplectic algorithm and the Hermite algorithm for N-body problems are studied with energies errors and semimajor axis and eccentricity .

Kuiper带天体的轨道偏心率和倾角的激励程度和天体的初始轨道半长径、偏心率、倾角有关。

Orbital eccentricity and inclination 's inspire degree are related to their initial orbital semimajor axis , eccentricity and inclination .

在这种情况下，存在三条路径可以达到当前构型，三条路径的半长径初值分别对应周期比平面上的三个不同区域。

In this situation , three paths exist to achieve the current configuration , whose initial semi-major axes respectively correspond to three different regions on the plane of two period ratios .

本文利用摄动理论研究了带电的赤道卫星在地球磁场中做椭圆轨道运动时地磁摄动力对轨道半长径和偏心率的摄动影响。

The perturbation effect of the earth 's magnetic field on the variation of the semimajor axis and eccentricity of the orbit of a charged equatorial satellite is studied by using the method of the perturbation .