- Additional Information
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Additional Information
Short Description Polydeuces is a small natural satellite of Saturn that is co-orbital with the moon Dione and librates around its trailing Lagrangian point (L5). Dione's other co-orbital moon is Helene, which is bigger and located at the leading L4 point. The name Polydeuces was approved by the IAU Working Group on Planetary System Nomenclature on January 21, 2005. In Greek mythology, Polydeuces is another name for Pollux, twin brother of Castor, son of Zeus and Leda. Due to gravitational interactions with Dione, its surface may be in hydrostatic equilibrium but not its interior, similar to Methone being in hydrostatic equilibrium due to interactions with Mimas. Polydeuces (moon) - Wikipedia, the free encyclopedia Discovered by Cassini Imaging Science Team Discovery date October 24, 2004 Type Moon AddInfo Saturn XXXIV / Dione C Satellite of Saturn Orbit Prograde Rotation Synchronous Shape Equilibrium spheroid Apoapsis 06 377 396 km Periapsis 06 377 396 km Semi-major axis 06 377 396 km Distance from Sun 01 9.554 909 au /18b Eccentricity 0.019 2 Orbital period 2.736 915 days Orbital speed 02 10.0 km/s Inclination to the equator 000.177 4 Diameter/Size 01 2.6 km Dimensions 3 × 2.5 × 2 km Mass 1013×1 ÷ 5 kg Density 0.5 g/cm3 Surface gravity 0,000 18 m/s2 Escape velocity 0.6 m/s Rotation period 2.736 915 days Apparent magnitude 25 - Comments
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