This question was answered under the International Astronomical Union definition of a planet, adopted on 24 August 2006, which mandated that a planet must have cleared the neighborhood around its orbit.
Esta pregunta foi contestada pola Unión Astronómica Internacional na definición de planeta, aprobada o 24 de agosto de 2006, que determinou que un planeta debe limpa-la súa órbita de corpos significativos ou relevantes.