Calypso co-orbits with Tethys and occupies the L5 (following) Lagrangian Point. The moon Telesco occupies the leading Lagrarian point. 
Calypso has dimensions of  30.2x23x14 km with a period of revolution of 0.887802  days. Planned flybys span the mission with close approaches in Aug. and Sept, 2010.
See 
Small Satellites Events (
xlsx, 
txt) observing log including range, flyby velocity and phase
 
For observation times and instruments compare Small Satellites Events file with 
Master Schedule.