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Effects of NEO composition on deflection methodologies

机译:NEO组成对偏转方法的影响

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摘要

During the early stages of NEO mitigation campaign planning, it is indispensable to characterise the hazardous object. However, exhaustive characterisation in close proximity to the object may not always be feasible when the lead time is in the order of a few years to a decade, hence causing uncertainty in its physical and compositional properties. This study aims to evaluate the reliability and robustness of different deflection methodologies subject to uncertainty in the asteroid composition. The Evidence Theory is used to quantify epistemic uncertainty in the asteroid properties. The kinetic impact, nuclear intercept, and the solar sublimation [mitigation approaches] are applied to a set of virtual Earth-threatening asteroids with different Keplerian elements, sizes (30-150m), and mission lead times (5-18 years) with the goal of a minimum 21/2 Earth-radii deviation distance. A typical S-type rubble pile configuration is used as the baseline asteroid composition for the study.
机译:在NEO缓解运动计划的早期阶段,表征危险物体是必不可少的。但是,当交货时间在几年到十年的数量级时,接近对象的详尽表征可能并不总是可行的,因此会导致其物理和组成特性的不确定性。本研究旨在评估受小行星组成不确定性影响的不同偏转方法的可靠性和鲁棒性。证据理论用于量化小行星特性中的认知不确定性。动力学影响,核拦截和太阳升华(缓解方法)被应用于一组虚拟的威胁地球的小行星,这些小行星具有不同的开普勒元素,大小(30-150m)和任务提前期(5-18年)。最小21/2地半径偏差距离的目标。典型的S型瓦砾堆构造用作研究的基准小行星组成。

著录项

  • 来源
    《Acta astronautica》 |2013年第1期|14-21|共8页
  • 作者单位

    Space Advanced Research Team, University of Glasgow, Glasgow G12 8QQ United Kingdom;

    Space Advanced Research Team, University of Glasgow, Glasgow G12 8QQ United Kingdom;

    University of Strathclyde, Glasgow G1 JXQ, United Kingdom;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    NEO; Composition; Physical property; Epistemic uncertainty; Mitigation;

    机译:NEO;成分;物理性质;认知不确定性;缓解;

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