An asteroid estimated to be 100 feet in diameter will rocket past Earth on Wednesday at a distance closer than the moon.

But NASA says the space rock poses no danger. The asteroid will still be about 217,000 miles away from Earth when it swings by at around 4 p.m. ET — that's about 22,000 miles closer than the Earth's average distance from the moon.

See also: 10 Brilliant Photos of the Moon and Jupiter

This space stone is just one of about 20 rocks per year that fly by Earth at a similar distance, according to NASA.

"The Near-Earth Object Observations Program, commonly called "Spaceguard," discovers these objects, characterizes a subset of them and identifies their close approaches to determine if any could be potentially hazardous to our planet," according to NASA's website.

But they don't catch everything. In fact, according to Phil Plait at Slate, NASA found yet another asteroid on Tuesday night that will also soon speed past Earth.

This one is about 10 meters across, half the size of the asteroid that smashed into Chelyabinsk, Russia last year and injured more than 1,400 people, and it'll pass by at a distance of just 35,000 miles around midnight on Thursday. The smaller rock will miss our planet this time, but currently has a 1 in 2.7 million chance of hitting Earth 11 years down the road.

Anyone who wants to watch the bigger asteroid won't be able to do so without a telescope, but but you can track its path in the video, below.

BONUS: NASA's Plan to Save Earth From Killer Asteroids