Asteroid Apophis: A Close Encounter in 2029
A Near-Earth Object and a Potential Hazard
WEB 99942 Apophis, formerly known as 2004 MN4, is a near-Earth asteroid and a potentially hazardous object (PHO). Its provisional designation, 99942, indicates that it was the 99,942nd asteroid discovered.
A Slight Risk in 2068
Apophis was initially thought to pose a slight risk of impacting Earth in 2068. However, subsequent radar observations have refined its orbit, and the risk of impact in 2068 is now considered negligible.
A Close Encounter in 2029
On April 13, 2029, Apophis will make a close approach to Earth, passing less than 32,000 kilometers from the Earth's surface. This is the closest known approach of a PHO of Apophis' size in recorded history.
Scientific Mission to Apophis
The European Space Agency (ESA) is planning a mission to Apophis called Ramses, which will launch in 2024 and arrive at Apophis in 2029. The mission will study the asteroid's composition, shape, and other characteristics.
A Rare Opportunity for Research
Apophis' close approach in 2029 presents a rare opportunity for scientists to study a near-Earth asteroid up close. Researchers from NASA's Jet Propulsion Laboratory (JPL) are already planning a number of experiments to take advantage of this opportunity.
Implications for Planetary Defense
The study of Apophis and other PHOs is important for planetary defense. By understanding the behavior of these objects, we can better prepare for the possibility of a future impact event.
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