title: Stability of halo orbits.
abstract: We predict new populations of trapped nonequatorial ("halo") orbits of charged dust grains about an arbitrary axisymmetric planet. Simple equilibrium and stability conditions are derived, revealing dramatic differences between positively and negatively charged grains in prograde or retrograde orbits. Implications for the Cassini mission to Saturn are discussed.
authors.affiliation: Center for Integrated Plasma Studies, Campus Box 0390, University of Colorado, Boulder, Colorado 80309, USA.
authors.forename: J E
authors.initials: JE
authors.lastname: Howard
authors.forename: H R
authors.initials: HR
authors.lastname: Dullin
authors.forename: M
authors.initials: M
authors.lastname: Horányi
mesh_terms: D004391:Dust; D008962:Models, Theoretical; D018539:Saturn; D018531:Spacecraft
chemical_list: D004391:Dust