Planetary orbital dynamics plays an important role in deflection space missions for planetary defense. For kinetic impact experimental task, whether in objective simulations ahead or data processing after, it will take an essential part of the high-precision orbital propagation of Near-Earth Asteroids (NEAs). Asteroids ephemeris based on the solar system dynamics model will provide the instantaneous orbital position of NEAs, which would be necessary for calculation of one of the engineering indicators,the asteroid orbital deflection. In this paper, the dynamical model generally used in asteroids ephemeris is given, and the effects of various perturbation factors on the magnitude are discussed. Then, by applying the above model on specific fictitious cases, impact effectiveness and feasibility of the project are evaluated in detail from four aspects: precision of asteroids ephemeris, impact moment and impact direction, observability and threat alteration.
CHEN Yuan-yuan
,
HU Shou-cun
,
LI Xin-ran
,
LI Bin
,
ZHAO Hai-bin
. Specific Application of Planetary Orbital Dynamics on Deflection Method of Kinetic Impact[J]. Journal of Space Science and Experiment, 2022
, 22(3)
: 46
-59
.
DOI: 10.19963/j.cnki.2096-4099.2022.03.006
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