If it were to hit the earth, the asteroid, named YU55, would have an impact equivalent to 65,000 atom bombs and would leave a crater more than six miles wide and 2,000ft deep.
Passing by at a distance of just 201,000 miles, the asteroid will be the largest object ever to approach the earth so close.
Nasa has officially labelled it a Potentially Hazardous Object, but have stressed there is no danger of impact while on its current course.YU55 orbits the sun every 14 years and last passed the earth in April 2010 at a distance of 1.5 million years.
There are currently 874 near earth asteroids which are considered to be potentially dangerous.
They are closely monitored and the list is being constantly added to as astronomers discover new objects in near space.Scientists estimate that there is usually one large collision with earth every few hundred thousand years.What do you think of this..? Do comments your views.