In this paper it is explained how most of asteroids can avoid very close approach to Jupiter, to the earth for earth orbit crossing asteroids, and to Neptune for Kuiper-belt asteroids by mechanisms which work also for Neptune-Pluto system. In fact the mutual distance of the planets cannot become very small as the critical argument librates around 180 0 because of 2:3 mean motion resonance and t...

On-orbit rescuing uncontrolled spinning satellite (USS) using space robot is a great challenge for future space service. This paper mainly present a trajectory planning method of space manipulator that can track, approach and catch the USS in free-floating situation. According to the motion characteristics of USS, we plan a spiral ascending trajectory for space manipulator to approach towards U...

The relative motion of a follower satellite with respect to the leader in a given circular orbit is described by nonlinear autonomous differential equations. The linearized equations around the null solution are known as Hill-Clohessy-Wiltshire (HCW) equations [1, 2]. The in-plane and out-of-plane motions are independent. The out-of-plane motion is always periodic, while the in-plane motion bec...

Space surveillance tracking problems, that are characterized by sparse observation data, necessitate long-term orbit propagation. For high area-to-mass-ratio space objects, long-term orbit uncertainty propagation needs to account for both conservative and non-conservative effect, such as the effect of solar radiation pressure, which results in non-negligible coupling between the orbital motion ...

In this article we describe the principle of computations of optimal transfers between quasi-Keplerian orbits in the Earth-Moon system using low-propulsion. The spacecraft’s motion is modeled by the equations of the control restricted 3-body problem and we base our work on previous studies concerning the orbit transfer in the two-body problem where geometric and numeric methods were developped ...

We compute analytically the weak (anti)localization correction to the Drude conductivity for electrons in tubular semiconductor systems of zinc-blende type. We include linear Rashba and Dresselhaus spin-orbit coupling (SOC) and compare wires of standard growth directions 〈100〉, 〈111〉, and 〈110〉. The motion on the quasi-twodimensional surface is considered diffusive in both directions: transvers...

Abstract : This paper presents a omni-directional mobile robot which can run on off-road and run over a obstacle. The robot equipped with crawler-roller running system. The motion analysis is also discussed to realize the autonomic off-road running. In order to automatically control the robot to run in optional direction and an orbit. We have to decide the inputting volts of the motors accordin...

A scheme is reported for the perturbative calculation of spin-orbit coupling (SOC) within the spin-free exact two-component theory in its one-electron variant (SFX2C-1e) in combination with the equation-of-motion coupled-cluster singles and doubles method. Benchmark calculations of the spin-orbit splittings in 2Π and 2P radicals show that the accurate inclusion of scalar-relativistic effects us...

We study gravitational radiation reaction in the equations of motion for binary systems with spin-orbit coupling, at order (v/c) beyond Newtonian gravity, or O(v/c) beyond the leading radiation reaction effects for non-spinning bodies. We use expressions for the energy and angular momentum flux at infinity that include spin-orbit corrections, together with an assumption of energy and angular mo...