halo orbit
periodic, three-dimensional orbit near the L1, L2 or L3 Lagrange points in the three-body problem of orbital mechanics
en-US/ˈheɪloʊ ˈɑɹbɪt/
en-GB/ˈheɪləʊ ˈɔːbɪt/
periodic, three-dimensional orbit near the L1, L2 or L3 Lagrange points in the three-body problem of orbital mechanics