Neves, RitaSanchez, Joan-Pau2018-10-312018-10-312018-02-11Rita Neves, and Joan Pau Sánchez. Optimization of asteroid capture missions using Earth resonant encounters. In: Vasile M., Minisci E., Summerer L., McGinty P. (eds) Stardust Final Conference on Asteroids and Space Debris, Volume 52, 2018978-3-319-69955-41570-6591https://doi.org/10.1007/978-3-319-69956-1_1https://dspace.lib.cranfield.ac.uk/handle/1826/13597This paper describes a robust methodology to design Earth-resonant asteroid capture trajectories leading to Libration Point Orbits (LPOs). These trajectories consider two impulsive manoeuvres; one occurring before the first Earth encounter and a final one that inserts the asteroid into a stable hyperbolic manifold trajectory leading to an LPO of the Sun-Earth system. The first manoeuvre is key to exploit the chaotic perturbative effects of the Earth and obtain important reductions on the cost of inserting the asteroid into a manifold trajectory. The perturbative effects caused by the Earth are here modelled by means of a Keplerian Map approximation, and these are a posteriori compared with the dynamics of the Circular Restricted Three-Body Problem. Savings in the order of 50% of total Δv are computed for four different asteroids.enAttribution-NonCommercial 4.0 InternationalConference paper