[bird (Anthony Wesley)]

Seeing was very good this morning - the forecast was for cloud but it
didn't arrive. Here's an image showing the GRS and also Callisto in
transit. There are some interesting blue festoon-like features around
the grs, and ongoing rifts in the NEB.

Oval BA is just visible on the limb at lower left, rotating into view.

This image allows an accurate measurement of the longitude of the GRS as
146.5 degrees cm3.

cheers, Bird