地球轨道：半长轴 a approximately equals 1,496 * 10^8 km， and approximately equals 0,0167 。日地最大距离（远日点）？地球轨道：半长轴 a approximately equals 1,496 * 10^8 km， and approximately equals 0,0167 。日地最大距离（远日点）？

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