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SHEPHERD: A Concept for Gentle Asteroid Retrieval with a Gas-Filled Enclosure

机译:SHEPHERD:具有充气外壳的轻柔小行星检索概念

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摘要

Sealing a small asteroid within an enclosure enables innovative approaches to the Asteroid Redirect Mission concept that pave the way for future in situ asteroid resource utilization. A sealed enclosure would make it possible to use an introduced atmosphere of xenon gas to detumble and despin the asteroid, and then to push the asteroid by using a steady xenon gas flow inside this enclosure to transfer the force of the spacecraft's exterior solar electric propulsion engine to the asteroid. The gas will affect the cohesion forces of the asteroid, but the differential pressures exerted on the asteroid and surface regolith will be much less than the expected combined cohesion forces of weakly consolidated rubble piles and fragile primitive asteroids, which are of prime scientific interest for planetary defense and origin-of-life studies. That makes it possible to bring such a weakly consolidated asteroid mostly intact to the Earth-Moon system. Once released into lunar orbit, a small intact asteroid can be a viable proving ground for manned missions to more distant and larger asteroids in solar orbit The development of this technology will benefit future asteroid resource utilization operations, in which enclosures are essential for providing protection from loose regolith and dust, capturing volatiles from icy objects, and enabling the use of reactive gasses in processing the asteroid material.
机译:将小型小行星密封在封闭空间内,可以实现针对小行星重定向任务概念的创新方法,从而为将来就地小行星资源利用铺平了道路。密封的外壳将使得可以使用引入的氙气气氛来分解和旋转小行星,然后通过在该外壳内部使用稳定的氙气气流推动小行星来传递航天器的外部太阳能推进发动机的力小行星。气体会影响小行星的内聚力,但是作用在小行星和表面砾石上的压差将远小于弱固结的碎石堆和易碎的原始小行星的预期组合内聚力,这对行星学具有重要的科学意义。防御和生命起源研究。这样就可以将这样一个弱固结的小行星带到地球-月球系统中,而它几乎是完整的。一旦释放到月球轨道上,一个完整的小行星就可以成为载人飞行任务的可行试验场,以向太阳轨道的更远和更大的小行星飞行。这项技术的发展将使未来的小行星资源利用活动受益,在这种活动中,围挡对于提供保护免受疏松的碎屑和尘土,捕获冰冷物体中的挥发物,并允许在处理小行星材料时使用反应性气体。

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  • 来源
    《New Space》 |2015年第1期|36-43|共8页
  • 作者单位

    SETI Institute, Mountain View, California,SETI Institute 189 Bernardo Avenue Mountain View, CA 94043;

    DigitalSpace Research, Boulder Creek, California;

    DigitalSpace Research, Boulder Creek, California;

    SETI Institute, Mountain View, California;

    Nott Technologies LLC, Santa Barbara, California;

    Accel Biotech, Inc., Los Gatos, California;

    Synthetics Intl. LLC, Houston, Texas;

    New Space Analytics LLC, Idaho Springs, Colorado;

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  • 正文语种 eng
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