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The IAU resolves that planets and other bodies in our solar system, except satellites, be defined into three distinct categories in the following way:

A planet is a celestial body that:

  1. is in orbit around the Sun
  2. has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape
  3. has cleared the neighbourhood around its orbit

A "dwarf planet" is a celestial body that:

  1. is in orbit around the Sun
  2. has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape
  3. has not cleared the neighbourhood around its orbit, and (d) is not a satellite.

All other objects except satellites orbiting the Sun shall be referred to collectively as Small Solar System Bodies.

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