An asteroid twice the size of the Empire State Building will barely miss the Earth in less than a month and fly past our planet at 23,100 km / h.
The asteroid 200 QW7 will make its next deployment on September 14th Space contractor warns we have "no defense" against killer asteroids.
The gigantic rock has a diameter of 650 m and is about twice as large as the Sky Tower of Auckland.
The discovery comes from Nasa's Center for Near Earth Object Studies (CNEOS), which says the asteroid will be only 5.3 million kilometers from Earth as it passes.
The news comes when Space X CEO Elon Musk issued a frightening warning about our susceptibility to asteroid attacks. There are no plans to fend off a killer rocket from space.
Musk said, "Would not be worried about this one, but a big rock will eventually hit Earth and we have no defense at present."
Apophis, named after the Egyptian god of chaos and darkness, is expected by scientists to pass several passes of the earth this century.
On his visit in 2029, the asteroid pass will be closer to the planet than our own weather. Satellites and a space buff have posted a frightening video about what would happen if it collided.
Video from You Tube user Space Sim reveals an Atlantic impact resulting in a devastating fireball that reaches as far as the US state of Kansas, over 4,000 km from impact.
Those who survived the first blow must then deal with debris that is raining back to Earth as fiery asteroids, though he notes that the rock has "a very small chance of actually hitting the Earth."
Nasa rates the probability of a collision as just one in 250,000.
"Apophis is a representative of some 2,000 currently known potentially dangerous asteroids," said Paul Chodas of NASA, gaining important scientific knowledge that could one day be used for planetary defense. "