Telesto is a moon of Saturn, discovered by Smith, Reitsema, Larson and Fountain in 1980 from ground-based observations. It is co-orbital with Tethys, residing in Tethys' leading Lagrangian point (L4). The moon Calypso resides in Tethys' trailing Lagrangian point.
- Orbital radius: 294,660 km
- Diameter: 29 km (34 x 28 x 36)
- Mass: Unknown
- Orbital inclination: 0°
- Orbital period: 1.8878 days