planetoid (plural planetoids)

  1. (astronomy) An asteroid of any size
    • 1979 Tsunami generation by pelagic planetoid impact
  2. (astronomy) An asteroid-like body in an orbit beyond the asteroid belt, such as a centaur or Kuiper belt object
  3. (astronomy) A larger, planetary, body in orbit around the Sun, such as Vesta or (candidate) dwarf planets such Eris or Sedna
    • 1991 Optimal trajectories for an ion driven spacecraft from earth to the planetoid Vesta
  4. (astronomy) A dwarf planet

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