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Optimal Deflection of NEOs en Route of Collision with the Earth

Kahle, Ralph and Hahn, Gerhard and Kührt, Ekkehard (2005) Optimal Deflection of NEOs en Route of Collision with the Earth. Icarus: International Journal of Solar System Studies (182), pp. 482-488. Elsevier. DOI: 10.1016/j.icarus.2006.01.005.

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Official URL: http://dx.doi.org/10.1016/j.icarus.2006.01.005


Recently, a method for the n-body analysis of the velocity change required to deflect a hazardous near-Earth object (NEO) was presented by Carusi et al. (2002). We extent this method in order to optimize the velocity change vector instead of its along-track magnitude. From an application of both methods to a fictitious NEO we find Carusi’s parallel approach to be reasonable for phases of unperturbed two-body motion. But, for orbit phases inhering third-body perturbations, i.e. for planetary close approaches or prior to a collision, the results obtained from the new method show the radial component of deflection impulse to play a major role. We show that a fivefold greater efficiency can be achieved by a deflection impulse being non-parallel to orbital velocity. The new method is applied to two possible 99942 Apophis impact trajectories in order to provide constraints for future Apophis deflection mission analysis.

Document Type:Article
Title:Optimal Deflection of NEOs en Route of Collision with the Earth
AuthorsInstitution or Email of Authors
Kührt, EkkehardUNSPECIFIED
Date:26 August 2005
Journal or Publication Title:Icarus: International Journal of Solar System Studies
Refereed publication:Yes
In ISI Web of Science:Yes
Page Range:pp. 482-488
Keywords:asteroids, comets, deflection
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):W - Vorhaben Asteroiden und Kometen (old)
Location: Berlin-Adlershof , Oberpfaffenhofen
Institutes and Institutions:Institute of Planetary Research
Space Operations and Astronaut Training
Deposited By: Dr.-Ing. Ralph Kahle
Deposited On:06 Jun 2006
Last Modified:14 Jan 2010 20:45

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