planetary object

noun3

1. •
   Any secondary body in the Solar system that is geologically differentiated or in hydrostatic equilibrium and thus has a planet-like geology: a planet, dwarf planet, or the larger moons and asteroids.
2. •
   Any substantial body in orbit around the Sun or other star: a planet, minor planet, or comet.
3. •
   Any substantial body associated with the development of planets: a protoplanet, planetesimal.