Effects of NEO composition on deflection methodologies

Sugimoto, Y., Radice, G. and Sanchez, J.P. (2013) Effects of NEO composition on deflection methodologies. Acta Astronautica, 90(1), pp. 14-21. (doi:10.1016/j.actaastro.2012.08.030)

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Abstract

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 (30–150 m), and mission lead times (5–18 years) with the goal of a minimum 2½ Earth-radii deviation distance. A typical S-type rubble pile configuration is used as the baseline asteroid composition for the study.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Radice, Dr Gianmarco
Authors: Sugimoto, Y., Radice, G., and Sanchez, J.P.
College/School:College of Science and Engineering > School of Engineering > Aerospace Sciences
Journal Name:Acta Astronautica
ISSN:0094-5765
ISSN (Online):1879-2030

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