The asteroid, called by NASA Asteroid 2019 AR2, will make a so-called "Earth Close Approach". Asteroid path calculations predict the rocks will reach their nearest distance to the ground tomorrow afternoon. NASA's Jet Propulsion Laboratory (JPL) expects Asteroid AR2 to fluctuate around noon. 6pm Sunday January 13th. The unexpected flyby comes just 10 days after barreling space rock was discovered by NASA's radars on January 3rd.
And tomorrow's flyby, the asteroid is estimated to strike past the ground at breakneck speeds of more than 10.780mph (4.82 km per second).
Fortunately, NASA does not expect the space rock to hit the ground anytime soon. The asteroid will miss the earth by nearly two million miles.
But the asteroid is big enough and will swing close enough for NASA to be aware of its journey around the solar system.
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JPL estimates Asteroid AR2 measurements somewhere in the range 1
An asteroid this great is about ten ten feet longer than a red London double-decker bus and is 1.45 times higher than the crooked tower of Pisa.
Even at the smaller end of the estimate, the asteroid is nine times longer than a Volkswagen Beatle car.  And asteroids much smaller than AR2 have been known to cause chaos and destruction when they hit the ground.
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The latest example is Chelyabinsk Meteor from 2013, which erupted over Chelyabinsk oblast in Russia six years ago.
The 20.6 meter long meteor remained undiscovered until it entered the Earth's atmosphere and injured more than 1, 5000 people as it burst windows into a wide radius.
NASA called the fearsome event a "cosmic wake-up call" for the dangers that lurk in the deep space.
The American spacecraft said, "The explosion is released more than 30 times the energy of the atomic bomb that destroyed Hirosh ima."
Tomorrow, the Asteroid AR2 will miss the earth by approx. 0.01954 astronomical units (au) or 1.8 million miles (2.92 million km).
This corresponds to approx. 7.60 times the distance between the ground and because of the distances concerned, NASA called Asteroid AR2 a "Near Earth Object".
NEOs are described as any asteroid or comet that pass the sun within 1.3 astronomical units or 120.8 million miles (194.4 million km).
NASA said, "Near Earth objects (NEOs) are comets and asteroids that have been crushed by the gravitational attraction of nearby orbiting planets that allow them to enter the Earth's neighborhood."