A concept of hazardous NEO detection and impact warning system

Ikenaga, T., Sugimoto, Y., Ceriotti, M. , Yoshikawa, M., Yanagisawa, T., Ikeda, H., Ishii, N., Ito, T. and Utashima, M. (2019) A concept of hazardous NEO detection and impact warning system. Acta Astronautica, 156, pp. 284-296. (doi: 10.1016/j.actaastro.2018.06.058)

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In 2013, the well-known Chelyabinsk meteor entered the Earth's atmosphere over Chelyabinsk, Russia. It is estimated that the meteor exploded at altitude near 30 km[2], which damaged thousands of buildings and injured a thousand of residents[3–4]. The estimated size of the meteor is approximately 20 m[2]. Because the meteor approached to Earth from Sun direction, no ground-based observatories could not detect until the impact. Considering such situations, the paper proposes a concept to detect Chelyabinsk-class small Near-Earth Objects. The concept addresses a “last-minute” warning system of NEO impact, in the same manner of “Tsunami” warning. To achieve the mission objective, two locations are assumed for the space telescope installation point i.e., Sun-Earth Lagrange point 1, SEL1 and Artificial Equilibrium Point, AEP. SEL1 is one of the natural equilibrium points, on the other hand, AEP is artificially equilibrated point by Sun and Earth gravity, centrifugal force and low-thrust acceleration. The magnitude of the acceleration to keep AEP is sufficiently small near 1 au radius orbit around the Sun i.e., the order of μm/s2 which can be achieved by solar sail. Through some cases of numerical simulations considering the size of NEOs and detector capability, this paper will show the feasibility of the proposed concept.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Ceriotti, Dr Matteo
Authors: Ikenaga, T., Sugimoto, Y., Ceriotti, M., Yoshikawa, M., Yanagisawa, T., Ikeda, H., Ishii, N., Ito, T., and Utashima, M.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Acta Astronautica
ISSN (Online):0094-5765
Published Online:30 June 2018
Copyright Holders:Copyright © 2018 IAA
First Published:First published in Acta Astronautica 156:284-296
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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