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Dealing with uncertainties in asteroid deflection demonstration missions: NEOTωIST

Published online by Cambridge University Press:  01 March 2016

Siegfried Eggl ,
Daniel Hestroffer ,
Juan L. Cano ,
Javier Martín Ávila ,
Line Drube ,
Alan W. Harris ,
Albert Falke ,
Ulrich Johann ,
Kilian Engel  and
Stephen R. Schwartz
...Show all authors
Siegfried Eggl
Affiliation:
IMCCE Observatoire de Paris, UPMC Paris-06, Univ. Lille 1, 77 av. Denfert-Rochereau, 75014 Paris, France email: siegfried.eggl@obspm.fr
Daniel Hestroffer
Affiliation:
IMCCE Observatoire de Paris, UPMC Paris-06, Univ. Lille 1, 77 av. Denfert-Rochereau, 75014 Paris, France email: siegfried.eggl@obspm.fr
Juan L. Cano
Affiliation:
DEIMOS Space S.L.U., Ronda de Poniente 19, 28760 Tres Cantos, Spain
Javier Martín Ávila
Affiliation:
DEIMOS Space S.L.U., Ronda de Poniente 19, 28760 Tres Cantos, Spain
Line Drube
Affiliation:
Institute of Planetary Research, German Aerospace Center (DLR), Rutherfordstr. 2, 12489 Berlin, Germany
Alan W. Harris
Affiliation:
Institute of Planetary Research, German Aerospace Center (DLR), Rutherfordstr. 2, 12489 Berlin, Germany
Albert Falke
Affiliation:
Airbus DS, Claude-Dornier-Str., 88090 Immenstaad, Germany
Ulrich Johann
Affiliation:
Airbus DS, Claude-Dornier-Str., 88090 Immenstaad, Germany
Kilian Engel
Affiliation:
Airbus DS, Claude-Dornier-Str., 88090 Immenstaad, Germany
Stephen R. Schwartz
Affiliation:
Labratoire Lagrange, Univ. Nice, CNRS, Observatoire de la Côte d'Azur, Boulevard de l'Observatoire, CS 34229, 06304 Nice Cedex 4, France
Patrick Michel
Affiliation:
Labratoire Lagrange, Univ. Nice, CNRS, Observatoire de la Côte d'Azur, Boulevard de l'Observatoire, CS 34229, 06304 Nice Cedex 4, France
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Abstract

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Deflection missions to near-Earth asteroids will encounter non-negligible uncertainties in the physical and orbital parameters of the target object. In order to reliably assess future impact threat mitigation operations such uncertainties have to be quantified and incorporated into the mission design. The implementation of deflection demonstration missions offers the great opportunity to test our current understanding of deflection relevant uncertainties and their consequences, e.g., regarding kinetic impacts on asteroid surfaces. In this contribution, we discuss the role of uncertainties in the NEOTωIST asteroid deflection demonstration concept, a low-cost kinetic impactor design elaborated in the framework of the NEOShield project. The aim of NEOTωIST is to change the spin state of a known and well characterized near-Earth object, in this case the asteroid (25143) Itokawa. Fast events such as the production of the impact crater and ejecta are studied via cube-sat chasers and a flyby vehicle. Long term changes, for instance, in the asteroid's spin and orbit, can be assessed using ground based observations. We find that such a mission can indeed provide valuable constraints on mitigation relevant parameters. Furthermore, the here proposed kinetic impact scenarios can be implemented within the next two decades without threatening Earth's safety.

Keywords

minor planetsasteroidscelestial mechanicsspace vehiclesmethods: statistical
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Issue S318: Asteroids: New Observations, New Models , August 2015 , pp. 231 - 238
Copyright
Copyright © International Astronomical Union 2016 

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