NASA's latest robotic addition had been created to "perform in extreme environments." The space agency is investing in robotics for deep space exploration and Valkyrie will compete in their Space Robotics Challenge in 2016.
The asteroid zoomed by Earth at a perfectly safe distance of around 1.8 million miles (2.9 kilometers).
Engineers expect to lose contact with the private US moon lander Odysseus on Tuesday, cutting short the mission after its sideways touchdown last week.
Police can strap bombs to robots to thwart bad guys in emergency situations.
