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. As a result, maintaining stability is crucial because halo orbits are generally unstable; therefore, station-keeping may be required to keep a satellite on the orbit.