NASA's SpaceWeather web page reports the roughly 50-foot diameter space rock, that is officially named "asteroid 2012 TC4," will pass within 60,000 miles of Earth, about a quarter of the distance between Earth and the moon.
"There is no danger of a collision," says the website.
The asteroid which is not visible with the naked eye will come closes to earth at about 10:30 p.m. local time.
"NASA hopes to ping this object with radar, refining its orbit and possibly measuring its shape," says the web page.
The object was discovered on Sunday.