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 Thebe Galileo spacecraft image of Thebe taken on Jan. 4, 2000, from a distance of 193,000 km. Credit: Cornell University, NASA The fourth moon of Jupiter; also known as Jupiter XIV. Together with Amalthea, Thebe appears to have supplied the material for Jupiter's Gossamer ring. Discovery 1979, by Stephen Synnott Semimajor axis 221,700 km (137,780 miles) Diameter 110 × 90 km (68 × 56 miles) Mean density 1.45 g/cm3 Escape velocity 0.063 km/s (227 km/h, 141 mph) Orbital period 0.675 day (16 hr 12 min.) Orbital eccentricity 0.018 Orbital inclination 0.90° Axial period synchronous Visual albedo 0.05 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