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99942 Apophis (provisional designation 2004 MN4) is a near-Earth asteroid and a potentially hazardous object, 450 by 170 metres 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. Additional observations provided improved ...
The chance of an unknown asteroid hitting Apophis off its current course at all was less than one-in-a-million. And the odds that such an impact would send it hurtling toward Earth in 2029 was ...
A menacing asteroid named Apophis is projected to have a close encounter with Earth in 2029, but scientists have long ruled it out as an impact risk. Asteroids safely fly by Earth all the time ...
An asteroid strike is a disaster; an asteroid flyby, an opportunity. And Apophis offers one of the best chances science has ever had to learn how the Earth came to be — and how we might one day ...
Ramses (spacecraft) Ramses, or Rapid Apophis Mission for Space Safety, is a proposed ESA mission to a near-Earth asteroid 99942 Apophis. If approved, it is expected to be launched in April 2028, to arrive at Apophis in February 2029, before its closest approach to Earth. It will conduct multiple measurements of the asteroid's properties, to ...
On December 24, 2004, 370 m (1,210 ft) asteroid 99942 Apophis (at the time known only by its provisional designation 2004 MN 4) was assigned a 4 on the Torino scale, the highest rating given to date, as the information available at the time translated to a 1.6% chance of Earth impact in April 2029. [90]
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.
Roy A. Tucker (1951 – 2021) was an American astronomer best known for the co-discovery of near-Earth asteroid 99942 Apophis (formerly known as 2004 MN4) along with David J. Tholen and Fabrizio Bernardi of the University of Hawaii. [2] He was a prolific discoverer of minor planets, credited by the Minor Planet Center with the discovery of 702 ...