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99942 Apophis (provisional designation 2004 MN 4) is a near-Earth asteroid and a potentially hazardous object with a diameter of 370 metres (1,210 feet) that caused a brief period of concern in December 2004 when initial observations indicated a probability up to 2.7% that it would hit Earth on April 13, 2029.
Mar 26, 2021 · This animation depicts the orbital trajectory of asteroid 99942 Apophis as it zooms safely past Earth on April 13, 2029. Earth’s gravity will slightly deflect the trajectory as the 1,100-foot-wide (340-meter-wide) near-Earth object comes within 20,000 miles (32,000 kilometers) of our planet’s surface.
Overview. Asteroid 99942 Apophis is a near-Earth object (NEO) estimated to be about 1,100 feet (335 meters) across. When it was discovered in 2004, Apophis was identified as one of the most hazardous asteroids that could impact Earth. But that impact assessment changed after astronomers tracked Apophis, and its orbit became better determined.
Apophis. 9009 views 37 likes. ESA / Space Safety / Planetary Defence. On 13 April 2029, the asteroid 99942 Apophis will pass less than 32 000 km from Earth’s surface. Roughly 375 m across on average, Apophis will, for a short time, be closer to Earth than telecommunications satellites in geostationary orbit and visible in the night sky to the ...
Feb 15, 2023 · Science & Medicine. Why a NASA spacecraft will crash into an asteroid Monday. Sept. 22, 2022. Apophis was discovered in 2004. After calculating its potential orbits, astronomers were startled to...
Summary. Researchers at NASA/JPL, Caltech, and Arecibo Observatory have released the results of radar observations of the potentially hazardous asteroid 99942 Apophis, along with an in-depth analysis of its motion. The research will affect how and when scientists measure, predict, or consider modifying the asteroid’s motion.
Mar 26, 2021 · March 26, 2021. Context Image. These images represent radar observations of asteroid 99942 Apophis on March 8, 9, and 10, 2021, as it made its last close approach before its 2029 Earth encounter that will see the object pass our planet by less than 20,000 miles (32,000 kilometers).
