Little is known about the tiny moon Helene other than its size (32 kilometers, or 20 miles) and its status as a Trojan moon of Dione (along with Polydeuces). All three moons share an orbit, but Helene lies 60 degrees ahead of Dione and Polydeuces lies 60 degrees behind Dione.

More Information

• Cassini-Huygens Website
  • Saturn’s Moons section
  • Helene Information

Table of Contents

• Introduction
• Pan
• Atlas
• Prometheus
• Pandora
• Janus
• Epimetheus
• Mimas
• Pallene and Methone
• Enceladus
• Telesto
• Tethys
• Calypso
• Helene
• Dione
• Polydeuces
• Rhea
• Titan
• Hyperion
• Iapetus
• Phoebe