The purpose of this paper was two-fold. First, we estimate
the accelerations and impulsive changes which would be
needed to direct a near-Earth heliocentric asteroid to an
Earth close encounter—with a perigee well within the Earth’s
Hill sphere—through planar, ephemeris-based trajectory
computations. Second, we developed an order-of-magnitude
thrust acceleration estimate for both the heliocentric phase
and geocentric capture phase.