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99942 Apophis (provisional designation 2004 MN 4) is a near-Earth asteroid and a potentially hazardous object, 450 metres (1,480 ft) by 170 metres (560 ft) in size, [3] that caused a brief period of concern in December 2004 when initial observations indicated a probability of 2.7% that it would hit Earth on Friday, 13 April 2029.
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 MN 4) along with David J. Tholen and Fabrizio Bernardi of the University of Hawaii. [2]
First discovered in 2004, Apophis is named for the Egyptian god of chaos and darkness and believed to be shaped like a peanut. ... Up close with a stony asteroid. Apophis is of interest because it ...
2004 (99942) Apophis (a near-Earth asteroid 370 meters in diameter) became the first object rated level 2 on 23 December 2004, [79] and was subsequently upgraded to level 4 — the current record for highest Torino rating. [79] (It is now known Apophis will pass 38000 km from Earth on 13 April 2029.)
Apophis was discovered in 2004. After calculating its potential orbits, astronomers were startled to realize it had a 3% chance of hitting Earth in 2029. ... Images of the asteroid Apophis ...
One of those is an asteroid with the name Apophis. First discovered in 2004, Asteroid 99942 Apophis measures across at 1,100 feet and is expected to make a very close brush with Earth in the next ...
For a brief period in late December 2004, with an observation arc of 190 days, asteroid 99942 Apophis (then known only by its provisional designation 2004 MN 4) held the record for the highest Palermo scale value, with a value of 1.10 for a possible collision in the year 2029. [9]
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 ...