它的轨道将它带到了距离地球1.22亿英里之内，距离地球相当之近。
Its orbit brought it relatively close to the Earth, within 122 million miles of it.
月球椭圆型的轨道意味着它到地球的距离是变化着的。
The Moon's elliptical orbit means its distance from the Earth is not constant.
他们轨道之间最小距离约200米。
Their orbits bring them together with a minimum distance of about 200m.
根据轨道动力学理论，建立了近距离空间拦截轨道的数学模型。
Based on orbit dynamic theory, the close interception model was set up.
根据轨道动力学理论，建立了近距离空间拦截轨道的数学模型。
Based on orbit dynamic theory, the close interception model was set up.
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