Planetary Profile:	Saturn Lithograph From NASA [Download]
Discovered by: P. Laques & J. Lecacheus Date of discovery: 1980 Distance from Saturn: 377,400 km (leads Dione) Radius: 18x16x15 km Orbital eccentricity: 0.005 Orbital inclination: 0.0 degree Orbital period: 2.7369 days	Natural Satellites Of Saturn Click on links to learn more about the moons of Saturn. Pan Atlas Prometheus Pandora Epimetheus Janus Mimas Enceladus Tethys Telesto Calypso Dione Helene Rhea Titan Hyperion Iapetus Phoebe Newly Found Moons

.....Helene was discovered by P. Laques and J. Lecacheus in 1980 through ground based observations. Helene is called a Dione Trojan satellite because it shares the same orbit as Dione at about 60 degrees ahead of its larger companion. Its diameter is about 36 x 32 x 30 kilometers (22 x 20 x 19 miles).