Journal
ACTA ASTRONAUTICA
Volume 167, Issue -, Pages 23-41Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actaastro.2019.10.042
Keywords
Near-Earth asteroid; Kinetic impactor; Deflection campaign; Uncertainty
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In this study, we introduce a framework for planning and assessing multi-spacecraft asteroid deflection campaigns. In the scenario considered, a near-Earth asteroid (NEA) is nudged away from gravitational keyholes via a kinetic impactor (KI) technique, lest its passage should incur an Earth collision in the future. An asteroid orbiter or/and an impactor is/are used in the precursor stage to obtain uncertain information about the target asteroid, whose launch date and trajectory are optimized using Chebyshev's method and a genetic algorithm. The KI mass is optimized through Monte Carlo simulations to improve the robustness of the method and achieve the minimum required probability of success (PoS). Case scenarios targeting Apophis and Bennu substantiate the utility of the framework in optimizing different deflection campaign architectures and making decisions amongst them via newly proposed visualization methods.
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