Young Phaeton, a hot rocky world
Name of Planet Phaeton
Distance from Sun 3 AU from Sol
Diameter 6102 km
Orbit Oribital period 3.7000 (years), Semi-major axis 3.0000 (AU), Eccentricity 0.0167, Inclination 0.0001 (degrees), Ascending node 348.739, Longitude of pericenter 102.947 (degrees)
Position in Solar System Mean longitude 100.464

Phaeton (or Phaëton, less often Phaethon) is the hypothetical planet posited to have existed between the orbits of Mars and Jupiter whose destruction supposedly led to the formation of the asteroid belt. The hypothetical planet was named for Phaethon, the son of the sun god Helios in Greek mythology, who attempted to drive his father's solar chariot for a day with disastrous results and was ultimately destroyed by Zeus.

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