T-100 Days Until Asteroid Approach Begins

August 17, 2018, marks the beginning of the mission’s Approach Phase. OSIRIS-REx will see Bennu with its PolyCam imager from a distance of approximately two million kilometers, and the team will officially begin Science Operations.

Each day from that point onward, as the spacecraft closes in on the asteroid, we will learn something new about Bennu. On December 3, 2018, OSIRIS-REx will arrive at Bennu and begin surveying the asteroid up close.

Credit: University of Arizona


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