Experts say it won't hit the planet and probably won't harm your cell phone service either, but its flyby is the closest ever predicted for an object this large, according to NASA. The asteroid, called 2012 DA14, will fly between Earth and the satellites that ring the planet 22,200 miles up.
Scientists think there may be 500,000 asteroids the size of 2012 DA14, but fewer than 1% have been located.
NASA says the asteroid is entirely unrelated to the meteor that exploded over Russia Friday.
Voice of Russia, CNN