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The OSIRIS-REx science team has released a short movie of Bennu made up of images taken by the spacecraft’s navigation camera during its preliminary approaches to the asteroid from November 30 to December 31, 2018.
You can watch it here. Because this is the navigation camera, the view is generally from far away. Nonetheless, you can see that during the passes over the north pole, the equator, and the south pole, the asteroid’s entire surface became visible as the asteroid rotated. From this they will be able to use the images taken by the high resolution cameras to create an excellent detailed global.