Just to clarify... the spacecraft will arrive at the asteroid tomorrow but will not land on it until July, 2020. In the meantime it will be mapping the asteroid in detail and looking for a safe, scientifically interesting place from which to gather a sample.
The OSIRIS-REx spacecraft sits on a fixture to undergo further testing at Lockheed Martins facility. Date Taken: Nov. 17, 2015
Credit: Lockheed Martin
Technicians gather around Lockheed Martins thermal vacuum chamber to watch the OSIRIS-REx spacecraft enter one of its last phases of testing. Date Taken: Feb. 11, 2016 Credit: University of Arizona/Symeon Platts