An asteroid nearly two miles (three kilometers) wide is set to pass by Earth Friday with no risk of impact, offering scientists a rare chance to study a massive flying object with its own moon.
Asteroid 1998 QE2 will make its closest approach to Earth at 4.59pm (20.59 GMT), at a distance of 3.6 million miles (5.8 million kilometers), or about 15 times the distance between Earth and the moon, the US space agency said.
"This is the closest approach the asteroid will make to Earth for at least the next two centuries," NASA said.
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