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Research Article

Planetary defense mission concepts for disrupting/pulverizing hazardous asteroids with short warning time

Bong Wie(), Ben Zimmerman, Joshua Lyzhoft, George Vardaxis
Department of Aerospace Engineering, Iowa State University, Ames, Iowa 50011, USA
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Abstract

This paper presents an overview of space mission concepts for disrupting or pulverizing hazardous asteroids, especially with warning time shorter than approximately 10 years. An innovative mission concept, referred to as a nuclear hypervelocity asteroid intercept vehicle (HAIV) system, employs both a kinetic-energy impactor and nuclear explosive devices. A new mission concept of exploiting a multiple kinetic-energy impactor vehicle (MKIV) system that doesn’t employ nuclear explosives is proposed in this paper, especially for asteroids smaller than approximately 150 m in diameter. The multiple shock wave interaction effect on disrupting or pulverizing a small asteroid is discussed using hydrodynamic simulation results. A multi-target terminal guidance problem and a planetary defense mission design employing a heavy-lift launch vehicle are also briefly discussed in support of the new non-nuclear MKIV mission concept. The nuclear HAIV and non-nuclear MKIV systems complement to each other to effectively mitigate the various asteroid impact threats with short warning time.

Keywords

planetary defensekinetic-energy impactor (KEI)asteroid disruptionterminal intercept guidanceheavy-lift launch vehicles (HLLV)

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Astrodynamics
Volume 1 Issue 1,
September 2017
Pages 3-21
DOI: 10.1007/s42064-017-0002-9
Cite this article:
Wie B, Zimmerman B, Lyzhoft J, et al. Planetary defense mission concepts for disrupting/pulverizing hazardous asteroids with short warning time. Astrodynamics, 2017, 1(1): 3-21. https://doi.org/10.1007/s42064-017-0002-9
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