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Scientific Requirements for Understanding the Near-Earth Asteroid Population

Harris, A. W. (2004) Scientific Requirements for Understanding the Near-Earth Asteroid Population. In: Mitigation of Hazardous Comets and Asteroids Cambridge University Press. pp. 141-152. ISBN 0521827647.

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Abstract

A vital prerequisite for the development of an effective mitigation strategy for hazardous near-Earth asteroids (NEAs) is a thorough understanding of their physical nature and mineralogical composition. The deflection of an object on collision course with the Earth would require the use of considerable force, the successful application of which would depend on prior knowledge of parameters such as mass, shape, strentgh, structure, and rotational characteristics. Recent experience has shown that much can be learned about individual objects from fly-by and rendezvous missions and such missions would play the dominant role in gathering mitigation-relevant information once a dangerous potential impactor had been identified, provided sufficient time were available before the impact. In the meantime, it is important to study the NEA population in general to enable the most likely physical characteristics of a potential future impactor to be anticipated as accurately as possible. Groundbased, airborne, and satellite observatories offer a wide range of techniques with which large numbers of near-Earth asteroids can be remotely sensed, including optical photometry, thermal-infrared spectroscopy, and radar. The merits of techniques most useful from the point of view of NEA hazard assessment and mitigation, and the type of information each can provide, are discussed. The interdependency of the interpretation of data from the various observing techniques is emphasized.

Document Type:Book Section
Additional Information: LIDO-Berichtsjahr=2003,
Title:Scientific Requirements for Understanding the Near-Earth Asteroid Population
Authors:
AuthorsInstitution or Email of Authors
Harris, A. W.UNSPECIFIED
Date:2004
Journal or Publication Title:Mitigation of Hazardous Comets and Asteroids
Refereed publication:Yes
In ISI Web of Science:No
Page Range:pp. 141-152
Editors:
EditorsEmail
Belton, M.J.S.UNSPECIFIED
Morgan, T.H.UNSPECIFIED
Samarasinha, N.H.UNSPECIFIED
Yeomans, D.K.UNSPECIFIED
Publisher:Cambridge University Press
ISBN:0521827647
Status:Published
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EW - Erforschung des Weltraums
DLR - Research area:Space
DLR - Program:W EW - Erforschung des Weltraums
DLR - Research theme (Project):UNSPECIFIED
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research
Deposited By: Susanne Pieth
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 16:23

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