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Ion Beam Shepherd for Asteroid Deflection

机译:小行星偏转的离子束牧羊犬

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摘要

Asteroid deflection is becoming a key topic in astrodynamics. Although no asteroid has been deflected so far, altering the trajectory of a small-sized asteroid to avoid a catastrophic impact with the Earth has been shown to be, in principle, technically feasible [1], and different techniques, ranging from nuclear detonation to kinetic impact and low-thrust methods, have been proposed [1-3]. Each of these methods shows advantages and drawbacks that, in general, depend on the mass and orbital characteristics of the particular asteroid to be deflected as well as its physical property (porosity, composition, surface reflectivity, etc.) and rotation state.
机译:小行星的挠度正成为空气动力学中的关键话题。尽管到目前为止,尚无小行星偏转,但从原理上讲,改变小型小行星的轨道以避免对地球的灾难性影响在技术上是可行的[1],从核爆轰到爆炸动力学冲击和低推力方法已经被提出[1-3]。这些方法中的每一种都有优点和缺点,通常取决于要偏转的特定小行星的质量和轨道特性,以及其物理性质(孔隙度,组成,表面反射率等)和旋转状态。

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