noun
(astronomy, dated) An asteroid of any size
(astronomy, dated) An asteroid-like body in an orbit beyond the asteroid belt, such as a centaur or Kuiper belt object
(astronomy) A larger, planetary, body in orbit around the Sun, such as Vesta or (candidate) dwarf planets such Eris or Sedna
(astronomy) Any planetary body, including classical planets and moons: a planetary-mass object
(astronomy) A dwarf planet
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