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99942 Apophis (provisional designation 2004 MN 4) is a near-Earth asteroid and a potentially hazardous object, 450 meters (1,480 ft) by 170 meters (560 ft) in size, [3] that caused a brief period of concern in December 2004 when initial observations indicated a probability 2.7% that it would hit Earth on Friday, 13 April 2029.
Apophis is classified as an S-type, or stony-type asteroid made up of silicate (or rocky) materials and a mixture of metallic nickel and iron. Radar images suggest it is elongated and possibly has two lobes, making it look something like a peanut.
After its discovery in 2004, asteroid 99942 Apophis had been identified as one of the most hazardous asteroids that could impact Earth. But that impact assessment changed as astronomers tracked Apophis and its orbit became better determined.
In just under half a decade, a 1,000-foot-wide (305-meter-wide) asteroid named after the Egyptian god of chaos and destruction, Apophis, will pass within 30,000 miles (48,300...
What to know about Apophis: City-killing asteroid to make close flyby to Earth in 2029. Astronomers can observe Apophis again in 2027. It won't be for three years until astronomers will be able...
NASA scientists at the agency's Jet Propulsion Laboratory effectively have ruled out the possibility the asteroid Aphophis will impact Earth in 2036.
The exercise focused on the real asteroid Apophis. For a short while after its discovery in 2004, Apophis was assessed to have a significant chance of impacting Earth in 2029 or later.
On April 13, 2029, asteroid Apophis will cruise harmlessly by Earth at distance of about 19,000 miles (31,000 kilometers). Scientists are already planning observations and science opportunities for the event.
On 13 April 2029, asteroid Apophis will come within 32 000 km of Earth’s surface. It will be the closest approach of an asteroid of this size that humankind has ever known about in advance. During the approach, Apophis will be significantly affected by Earth’s mighty gravity.
Debate remains about how close to a planet an asteroid must come to Earth’s center for events like this to occur, with estimates ranging from 3-16 Earth radii distance. The 2029 passage will be ...