Main Page | See live article | Alphabetical index 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 × 32 × 30) Mass: Unknown Orbital period: 2.7369 days Orbital inclination: 0.2° This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.