[X] My Assistant

[Bjorn Jonsson]

On January 17, 2008 Cassini imaged Rhea from a range of ~500,000 km as the phase angle dropped to almost 0 degrees. This is an animation of 17 calibrated clear filter frames with the phase angle displayed at lower right:



As the animation shows Rhea gets significantly brighter when the phase angle drops to almost 0 degrees - this is a very pronounced effect. Note that the phase angle changes at a very uneven rate - the time between the images is variable.

The graph I posted in this thread is based on these same images.