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99942 Apophis (provisional designation 2004 MN4) is a near-Earth asteroid and a potentially hazardous object with a diameter of 370 metres (1,210 feet) [ 3 ] 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.
Asteroid impact prediction is the prediction of the dates and times of asteroids impacting Earth, along with the locations and severities of the impacts. The process of impact prediction follows three major steps: Discovery of an asteroid and initial assessment of its orbit which is generally based on a short observation arc of less than 2 weeks.
Apophis is of interest because it’s an S-type, or stony, asteroid — different from other space rocks visited by NASA missions, including Bennu, which is a C-type, or carbonaceous, asteroid.
OSIRIS-REx in Launch Configuration. OSIRIS-REx[ a ] was a NASA asteroid-study and sample-return mission that visited and collected samples from 101955 Bennu, a carbonaceous near-Earth asteroid. [ 14 ] The material, returned in September 2023, is expected to enable scientists to learn more about the formation and evolution of the Solar System ...
September 13, 2024 at 10:58 AM. In a bit of ominous news befitting a Friday the 13th: It turns out that the asteroid Apophis could have a very small chance of colliding into Earth in five years ...
Apophis, a near-Earth object estimated to be about 1,100 feet across, was previously identified as an object of concern. But, any risk that it could impact Earth has been ruled out, as well as the ...
In the same year, NASA released a study where the asteroid Apophis (with a diameter of around 300 meters or 1,000 feet) was assumed to have a much lower rubble pile density (1,500 kg/m 3 or 100 lb/cu ft) and therefore lower mass than it is now known to have, and in the study, it is assumed to be on an impact trajectory with Earth for the year ...
After delivering an asteroid sample to Earth Sunday, the newly expanded OSIRIS-APEX mission is heading to Apophis. The asteroid will come within 20,000 miles of Earth in 2029.