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Astrodynamics

Article Title

Equilibrium points and orbits around asteroid with the full gravitational potential caused by the 3D irregular shape

Keywords

equilibrium points, orbits, polyhedral model, asteroids, 1333 Cevenola

Abstract

We investigate the equilibrium points and orbits around asteroid 1333 Cevenola by consideringthe full gravitational potential caused by the 3D irregular shape. The gravitational potentialand effective potential of asteroid 1333 Cevenola are calculated. The zero-velocity curvesfor a massless particle orbiting in the gravitational environment have been discussed. Thelinearized dynamic equation, the characteristic equation, and the conserved quantity of theequilibria for the large-size-ratio binary asteroid system have been derived. It is found thatthere are totally five equilibrium points close to 1333 Cevenola. The topological cases of theoutside equilibrium points have a staggered distribution. The simulation of orbits in the fullgravitational potential caused by the 3D irregular shape of 1333 Cevenola shows that themoonlet’s orbit is more likely to be stable if the orbit inclination is small.

Publisher

Tsinghua University Press

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