99942 Apophis is a near-Earth asteroid and potentially hazardous asteroid with a diameter of 370 metres that caused a short period of concern in December 2004 when initial observations briefly indicated a probability up to 2.7% that it would hit Earth on April 13, 2029.

What would happen if Apophis hit the Earth?

Possible impact effects

The Sentry Risk Table estimates that Apophis would impact Earth with kinetic energy equivalent to 1,200 megatons of TNT. The impacts that created Meteor Crater, Arizona about 50,000 years ago and the Tunguska event of 1908 are estimated to be between 3–10 megatons.

What does NASA say about Apophis?

NASA Says Asteroid Apophis Isn't A Risk To Earth For 100 More Years : NPR. NASA Says Asteroid Apophis Isn't A Risk To Earth For 100 More Years The asteroid Apophis was taken off of NASA's "risk list" after the space agency determined earlier this month that it poses no risk of impact to Earth within the next century.