Asteroid to make a very close pass by Earth

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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.

Just five years ago a slightly smaller asteroid entered Earth's atmosphere in Chelyabinsk, Russia with the force of a nuclear explosion shattering thousands of windows in buildings and injuring 1,500 the area.

This recently discovered asteroid it estimated by NASA to be anywhere from 50 to 120 feet across. "These asteroids are simply too small to be detected until they get really close to our planet", added Chodas.

"Asteroids of this size do not often approach this close to our planet-maybe only once or twice a year", said Paul Chodas, the manager of NASA's Center for Near-Earth Object Studies. The other asteroid 2018 CC, during its close flyby on February 6, was nearly 114,000 miles (184,000 kilometers) away from Earth.

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That was the case at Chelyabinsk, Russia on February 15, 2013; the incoming object - an intense fireball as it entered the atmosphere - caught everyone by surprise.

The asteroid was found by NASA-funded Catalina Sky Survey (CSS) near Tucson, Arizona, that records potentially hazardous asteroids.

According to the, more than 90 per cent of the near-Earth objects bigger than one kilometre have been discovered.

The asteroid is now known as 2018 CB, and its closest approach comes on the heels of another asteroid flyby, which occurred Tuesday at 12:10 p.m.