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Title:
Dealing with uncertainties in asteroid deflection demonstration missions: NEOTomegaIST
Authors:
Eggl, Siegfried; Hestroffer, Daniel; Cano, Juan L.; Ávila, Javier Martín; Drube, Line; Harris, Alan W.; Falke, Albert; Johann, Ulrich; Engel, Kilian; Schwartz, Stephen R.; Michel, Patrick
Affiliation:
AA(IMCCE Observatoire de Paris, UPMC Paris-06, Univ. Lille 1, 77 av. Denfert-Rochereau, 75014 Paris, France ), AB(IMCCE Observatoire de Paris, UPMC Paris-06, Univ. Lille 1, 77 av. Denfert-Rochereau, 75014 Paris, France ), AC(DEIMOS Space S.L.U., Ronda de Poniente 19, 28760 Tres Cantos, Spain), AD(DEIMOS Space S.L.U., Ronda de Poniente 19, 28760 Tres Cantos, Spain), AE(Institute of Planetary Research, German Aerospace Center (DLR), Rutherfordstr. 2, 12489 Berlin, Germany), AF(Institute of Planetary Research, German Aerospace Center (DLR), Rutherfordstr. 2, 12489 Berlin, Germany), AG(Airbus DS, Claude-Dornier-Str., 88090 Immenstaad, Germany), AH(Airbus DS, Claude-Dornier-Str., 88090 Immenstaad, Germany), AI(Airbus DS, Claude-Dornier-Str., 88090 Immenstaad, Germany), AJ(Labratoire Lagrange, Univ. Nice, CNRS, Observatoire de la Côte d'Azur, Boulevard de l'Observatoire, CS 34229, 06304 Nice Cedex 4, France), AK(Labratoire Lagrange, Univ. Nice, CNRS, Observatoire de la Côte d'Azur, Boulevard de l'Observatoire, CS 34229, 06304 Nice Cedex 4, France)
Publication:
Asteroids: New Observations, New Models, Proceedings of the International Astronomical Union, IAU Symposium, Volume 318, pp. 231-238
Publication Date:
01/2016
Origin:
CUP
Keywords:
minor planets, asteroids, celestial mechanics, space vehicles, methods: statistical,
Abstract Copyright:
(c) 2016: Copyright © International Astronomical Union 2016
DOI:
10.1017/S1743921315008698
Bibliographic Code:
2016IAUS..318..231E

Abstract

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 NEOTomegaIST asteroid deflection demonstration concept, a low-cost kinetic impactor design elaborated in the framework of the NEOShield project. The aim of NEOTomegaIST 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.
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