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This is a list of asteroids that have impacted Earth after discovery and orbit calculation that predicted the impact in advance, which are cataloged by the Center for Near-Earth Object Studies (CNEOS). [1]
The average near-Earth asteroid, such as 2019 VF 5, passes Earth at 18 km/s. The average short-period comet passes Earth at 30 km/s, and the average long-period comet passes Earth at 53 km/s. [9] A retrograde parabolic Oort cloud comet (e=1, i=180°) could pass Earth at 72 km/s when 1 AU from the Sun.
Once the initial orbit is known, the potential positions can be forecast years into the future and compared to the future position of Earth. If the distance between the asteroid and the centre of the Earth is less than Earth radius then a potential impact is predicted. To take account of the uncertainties in the orbit of the asteroid, many ...
An asteroid nearly the size of a football field now has roughly a 0.004% chance of hitting Earth in about eight years, NASA says — with the space agency saying it "no longer poses a significant ...
Geologists believe that objects up to 450ft in diameter hit Earth every 100 to 300 years (Alamy) ... was Comet Shoemaker-Levy 9, which smashed into Jupiter in 1994. ... "For a while, we had ...
Comet Tsuchinshan-Atlas, also known as C/2023 A3, is making its way towards Earth and is expected to be visible to the naked eye – meaning without a telescope or other equipment – on Wednesday ...
A list of the 145 known near-Earth asteroid close approaches less than 1 lunar distance (0.0025696 AU (384,410 km; 238,860 mi)) from Earth in 2024, based on the close approach database of the Center for Near-Earth Object Studies (CNEOS). [1] For reference, the radius of Earth is about 0.0000426 AU (0.0166 LD; 6,370 km; 3,960 mi).
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, April 13, 2029.