The 120m-long mass of rock is making a “close approach” to earth on August 2, according NASA scientists.
Experts say anything larger than 100m in length have the potential to unleash potential world-ending effects, creating an extinction level event.
One such doomsday scenario could see the asteroid trigger a mini ice age if it struck earth.
“These would not be pleasant times”
Charles Bardeen, of the National Center for Atmospheric Research
The powerful impact would throw dust up into the atmosphere, causing average temperatures to plummet to as low as 8C globally.
The “severe global impact” would last several years, scientists say, with the world becoming a much colder and darker place.
Charles Bardeen, of the National Center for Atmospheric Research, said these cooler temperatures would be “about the equivalent of the ice ages”.
“These would not be pleasant times,” he warned.
NASA keeps track of any asteroids or comets that are expected to pass within 4.6million miles of the centre of the Earth – which are called “close approaches”.
But due to its size, it is still classed as a Potentially Hazardous Asteroids, which are space rocks larger than approximately 100m.
And due to the uncertainty of its flight path, and in space terms its distance remains a whisker away, the threat is very real.
Conspiracy theorists are having a field day online, with many videos claiming the huge asteroid will crash into our planet destroying human life just next month.
A spokesman said: “NASA knows of no asteroid or comet currently on a collision course with Earth, so the probability of a major collision is quite small.
“In fact, as best as we can tell, no large object is likely to strike the Earth any time in the next several hundred years.
“NASA has also made asteroid detection a top priority, and are developing strategies for identifying asteroids that could pose a risk to our planet.”
[Source:- DAILY STAR]