NASA says "Asteroid TC4" is about 56 feet wide and will come only 59,000 miles of our planet. That's about one-fourth the distance to the moon.
But NASA says the huge rock poses no danger and calls the close-encounter a guaranteed miss.
You can watch a live telescope view of the asteroid online using the links below:
The Virtual Telescope Project 2.0
Asteroids: Formation, Discovery and Exploration