(CNN) - NASA and astronomers around the world are tracking a huge asteroid.
Nicknamed The Beast because of its size, the flying rock is expected to pass within almost 800,000 miles of the Earth on Sunday.
That's three times farther away than the moon, but still pretty close for an asteroid of its size.
NEOWISE, a space telescope adapted for scouting the skies for asteroids and comets, estimates The Beast is between 800 and 1,300 feet wide.
It's moving at a quick clip of 31,000 mph.
NASA's Near Earth Object Program said, "There is zero chance of an impact."
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