Continuous "families" of both northern and southern halo orbits exist at each Lagrange point. Because halo orbits tend to be unstable, station-keeping using thrusters may be required to keep a satellite on the orbit.
Continuous "families" of both northern and southern halo orbits exist at each Lagrange point. Due to halo orbits' tendency to be unstable, station-keeping using thrusters may be necessary to maintain a satellite on the orbit.