PLANETS & MOONS A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site Metis The innermost moon of Jupiter, also known as Jupiter XVI; it is a small object of uneven shape. Together with Adrastea, Metis orbits inside the synchronous orbit radius of Jupiter, which means that it orbits faster than Jupiter rotates on its axis. As a result, its orbit will eventually decay and Metis will fall into the planet. Metis and Adrastea also circle around inside Jupiter's main ring and are undoubtedly the source of the material in this ring. Discovery 1979, by Stephen Synnott Semimajor axis 127,690 km (79,340 miles) Diameter 43 km (27 miles) Mean density 3.0 g/cm3 Escape velocity 0.027 km/s (97 km/h, 60 mph) Orbital period 0.295 days (7 h 5 min.) Orbital eccentricity 0.001 Orbital inclination 0.000° Visual albedo 0.06 Related entry    • Jupiter, moons Related category    • PLANETS AND MOONS Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP