NDLI: Near earth asteroid orbit perturbation and fragmentation

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Near earth asteroid orbit perturbation and fragmentation

Content Provider	NASA Technical Reports Server (NTRS)
Author	Ahrens, Thomas J. Harris, Alan W.
Copyright Year	1992
Description	Collisions by near earth asteroids or the nuclei of comets pose varying levels of threat to man. A relatively small object, approximately 100 meter diameter, which might be found on an impact trajectory with a populated region of the Earth, could potentially be diverted from an Earth impacting trajectory by mass driver rocket systems. For larger bodies, such systems would appear to be beyond current technology. For any size object, nuclear explosions appear to be more efficient, using either the prompt blow-off from neutron radiation, the impulse from ejecta of near-surface explosion for deflection, or as a fragmenting charge. Practical deflections of bodies with diameters of 0.1, 1, and 10 km require interception, years to decades prior to earth encounter, with explosions a few kilotons, megatons, or gigatons, respectively, of equivalent TNT energy to achieve orbital velocity changes or destruction to a level where fragments are dispersed to harmless spatial densities.
File Size	726472
Page Count	21
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19920011112
Archival Resource Key	ark:/13960/t86h9gd0m
Language	English
Publisher Date	1992-03-18
Access Restriction	Open
Subject Keyword	Astrophysics Deflection Destruction Meteoroid Hazards Fragments Trajectories Hypervelocity Impact Fragmentation Meteorite Collisions Nuclear Explosions Meteoritic Damage Ejecta Meteoroid Protection Comet Nuclei Asteroids Interception Orbit Perturbation Impact Damage Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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