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Asteroid Deflection by Leveraging Rotational Self-Energy
Journal of Spacecraft and Rockets ( IF 1.3 ) Pub Date : 2021-03-08 , DOI: 10.2514/1.a34889
Andrea Viale 1 , Colin McInnes 1 , Gilles Bailet 1 , Matteo Ceriotti 1
Affiliation  

A novel concept for the deflection of rotating asteroids is presented, based on the conversion of the asteroid rotational kinetic energy into translational kinetic energy. Such conversion is achieved using an orbital siphon, a tether-connected chain of masses, arranged vertically from the asteroid surface, which exploits the rotation of the asteroid for the delivery of mass from the asteroid to escape. Under the conditions to be discussed, the siphon can be initiated to ensure self-sustained flow of mass from the asteroid to escape. This mechanism is proposed to use a fraction of the asteroid as reaction mass, with the asteroid rotational kinetic energy leveraged to deliver the mass to escape, and hence impart a reaction on the asteroid itself. Key parameters, such as velocity change, deflection duration, tension requirements, and siphon length, are discussed. Deflection effectiveness is assessed for different release strategies. It is shown that typical velocity changes on the order of 1 cms1 can be achieved within a time window of a decade.



中文翻译:

利用旋转自能偏转小行星

基于小行星旋转动能到平移动能的转换,提出了一种新颖的偏转小行星的概念。这种转换是使用轨道虹吸管实现的,该虹吸管是从小行星表面垂直排列的,系链的质量链,它利用小行星的旋转来从小行星中释放出质量来逃逸。在将要讨论的条件下,可以启动虹吸管以确保小行星的自我维持质量流逸出。提出该机制使用小行星的一部分作为反应物质,小行星的旋转动能被利用来释放该物质以逃逸,从而使小行星自身发生反应。关键参数,例如速度变化,挠曲持续时间,张力要求和虹吸管长度,讨论。针对不同的释放策略评估挠曲效果。结果表明,典型的速度变化约为1个 厘米s-1个 可以在十年的时间范围内实现。

更新日期:2021-03-09
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