Helene Observations

helene picture
Image PIA12723.jpg
Helene resides in the leading Lagrangian point L4 of Dione.

Helene has dimensions of 43.4x38.2x26 km with a period of revolution of 2.736915 days. Planned flybys span the mission with close approaches on Nov 4, 2008, Mar 3, 2010 and Jun 18, 2011.

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.

  Observations were made by:
CIRS - Composite Infrared Spectrometer
ISS - Imaging Science Subsystem
UVIS - Ultraviolet Imaging Spectrograph
VIMS - Visual and Infrared Mapping Spectrometer