According to NASA, it will make its closest approach to Earth at 10:30 p.m. GMT (5:30 p.m. EST) today.
One of two recently-discovered small asteroids will safely pass by Earth Friday, after the first did so earlier this week.
Scientist had been tracking Asteroid 202 AJ129 for about a year and knowing all along that this medium sized space rock posed no threat to Earth.
The asteroid was found by NASA-funded Catalina Sky Survey (CSS) near Tucson, Arizona, that records potentially hazardous asteroids.
Paul Chodas of NASA's Center for Near-Earth Object Studies, told The Guardian that asteroids of this size don't often come close to our planet.
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The asteroid, which is the size of an apartment block, will whizz past the our planet 39,000 miles away - less than one fifth the distance to the Moon.
It will be the second time this week an asteroid buzzes us.
Astronomers say it is between 50 and 130 feet wide, which means it may well be bigger than the asteroid that entered the atmosphere over Chelyabinsk, Russia, and slammed into the ground nearby in 2013.
During the 2013 Chelyabinsk event, 1500 people were injured and 7300 buildings damaged by the intense overpressure generated by the shockwave at Earth's surface. Spotted by CSS, 2018 CC zoomed past Earth at about 8:10 p.m. GMT (3:10 p.m. EST) on Tuesday Feb. 6.at a distance of about 114,000 miles (184,000 kilometers). Scientists estimated the asteroid was 50-100 feet in diameter.
While 2018 CB is too small for amateur telescopes, it can be viewed live online with the.
