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Helene (moon)

Helene, as imaged by Voyager 2 (NASA)

Helene is a moon of Saturn, discovered by Laques and Lecacheux in 1980 from ground-based observations. It is co-oribtal with Dione and located in its leading Lagrangian point (L₄) and hence is sometimes referred to as "Dione B".

Orbital radius: 377,400 km
Diameter: 33 km (36 x 32 x 30)
Mass: Unknown
Orbital period: 2.7369 days
Orbital inclination: 0.2°

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