Metis

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Metis (pronounced "MEE tis") is the innermost of Jupiter's known moons. It was discovered in 1979 by the Voyager 1 probe and named after a Titaness who was the first wife of Zeus and the mother of Athena. It lies within Jupiter's main planetary ring, and may be the source of the material that comprises it. Its orbit lies inside Jupiter's synchronous orbit radius, and as a result tidal forces are slowly causing its orbit to decay. It is also within Jupiter's Roche limit, but is small enough to avoid tidal disruption.

  • Orbital radius: 127,600 km
  • Diameter: 40 km
  • Mass: 9.56*1016 kg
  • Orbital period: 7.08 hours
  • Orbital inclination: 0°