Facts about Callisto


  • the second largest moon orbiting Jupiter.
  • the third largest moon in the solar system.
  • a diameter of 2,985 miles, which is only 1% smaller than the planet Mercury.
  • Callisto is the 8th moon in distance from Jupiter and takes 17 days to make one complete orbit of the planet.
  • it orbits Jupiter at an average distance of 1,168,000 miles.
  • due to its orbit being further away from Jupiter it is not under the same tidal heating influences as Io, Europa or Ganymede.
  • despite the lack of internal heat generated by Jupiter’s gravity it is still possible that Callisto could have a salty subsurface ocean.
  • orbits beyond Jupiter’s main radiation belt making it one of more safer environments in the outer solar system to locate a future manned base.
  • most cratered object in the solar system and has the oldest landscape.
  • the lowest density of any of the “Galilean Moons”.

Back to   Jupiter’s page  /  Jupiter’s Galilean moons   /   The Solar System’s page

Comments are closed.