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Deflection and Fragmentation of Near-Earth Asteroids

Show simple item record Ahrens, Thomas J. en_US Harris, Alan W. en_US 2004-10-06T17:35:40Z 2004-10-06T17:35:40Z 1992-12 en_US
dc.identifier.citation Nature en_US
dc.identifier.clearanceno 92-1998 en_US
dc.description.abstract Collisions by near-earth asteroids or the nuclei of comets pose varying levels of threat to man. A relatively small object, approximately 100 m diameter, which might be found on an impact trajectory with a populated region of the Earth, could potentially be diverted with a velocity of approximately1 cm/sec from an Earth impacting trajectory by impact (at 12 km/sec) by a rocket launched, 10^2 to 10^3 Kg impactor. For larger bodies, the use of kinetic energy impactors appear impractical because of the larger mass requirement. 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 a near-surface explosion for deflection, or, least efficiently, as a fragmenting charge. en_US
dc.language.iso en_US
dc.title Deflection and Fragmentation of Near-Earth Asteroids en_US

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