This paper compares the usual Hohmann and bielliptic geostationary transfer orbits with lunar assisted transfers. It turns out that lunar assisted transfers are more economical for any inclination greater than the Moon orbit inclination. The lunar assisted transfers based on traditional flyby are analyzed: these are characterized by high values of the Keplerian apogee distance x _a. Reducing such distance, the spacecraft approaches the Moon with lower energy and the lunar gravitational help can be more effective. In fact it is shown that transfers with smaller x _a, called far lunar assisted geostationary transfers, are the most economical.

中文翻译：

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月球协助地球飞船的平面动作

本文将常规的霍曼和双椭圆对地静止转移轨道与月球辅助转移进行了比较。事实证明，对于任何大于月球轨道倾角的倾角，月球辅助转移更为经济。分析了基于传统飞越的月球辅助传递：这些特征以开普勒远地点距离 x _a的高值为特征 。减小这种距离，航天器以较低的能量接近月球，而月球引力帮助会更有效。实际上，事实证明， x _a较小的传输 （称为远月辅助地球静止传输）是最经济的。