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Asteroid Characterization Priorities for Planetary DefenseWe propose a prioritized list of asteroid characterization needs for planetary defense. In particular, we consider the properties of asteroids that are of greatest interest for assessment of planetary defense options, including gravity tractors, kinetic impactors, and nuclear explosives. In addition, much of our discussion is relevant for impact assessments and subsequent emergency-response planning. Rather than intending this as a definitive answer, however, our purpose is to stimulate and focus disscussion regarding characterization needs for planetary defense, with a specific list as a starting point. A key theme is understanding the sensitivity of the outcome of an asteroid deflection or disruption effort to the asteroids physical properties.There is a range of previous work relevant to our topic, including some explicit discussions as well as many more that are implicitly relevant. We incorporate elements from such reports while extending them using our own experience and perspectives. After introducing our prioritized list, we provide further discussion on each element, with details on the relevance of each characteristic for modeling purposes, our rationale for the assigned priority, and examples of analyses that require improved characterization information. Our goal is to establish a framework that can be modified and adapted by the community for a variety of purposes, such as mission design and optimization, development of new measurement techniques, or prioritization of research efforts. The objective is to increase understanding and reduce uncertainties in the specific aspects of characterization that most benefit accurate assessments of practical techniques for planetary defense.
Document ID
20190027067
Acquisition Source
Ames Research Center
Document Type
Abstract
Authors
Miller, Paul (Lawrence Livermore National Lab. Livermore, CA, United States)
Morrison, David (NASA Ames Research Center Moffett Field, CA, United States)
Barbee, Brent (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
July 9, 2019
Publication Date
April 13, 2015
Subject Category
Astrophysics
Report/Patent Number
ARC-E-DAA-TN21736
Meeting Information
Meeting: IAA Planetary Defense Conference
Location: Frascati
Country: Italy
Start Date: April 13, 2015
End Date: April 17, 2015
Sponsors: International Academy of Astronautics
Funding Number(s)
WBS: 582622.02.01.02.45.10.03
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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