Research topic: Helene

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Helene

The Columbia Encyclopedia, Sixth Edition
Helene , in astronomy, one of the named moons, or natural satellites, of Saturn . Also known as Saturn XII (or S12), Helene is an irregularly shaped (nonspherical) body measuring about 22 mi (36 km) by 20 mi (32 km) by 18 mi (30 km); it orbits Saturn at a mean distance of 234,500 mi (377,400 km) and has an orbital period of 2.7369 earth days—the rotational period is unknown but is assumed to be the same as the orbital period. It was discovered by French astronomers P. Laques and J. Lecacheaux in 1980 during ground-based observations of Saturn. Another moon, Dione , is co-orbital with... Read more
Helene
Helene A satellite of Saturn, at a distance of 377 400 km; also known as Saturn XII. Helene's orbital period is 2.737 days. It shares the same orbit...lying 60° ahead of it in the leading Lagrangian point. Helene is 36 × 32 × 30 km in size. It was discovered... Read more
Helene
Helene (Saturn XIII) One of the lesser satellites of Saturn , discovered in 1980 by Voyager 1 , with a radius of 16 km; visual albedo 0.7. Read more

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