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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, April 13, 2029.
Asteroid designation Date & time (UTC) of discovery Discoverer Estimated size Abs. mag. Date & time (UTC) of impact Warning time Location of impact Airburst altitude Energy Method of impact detection Reference 2008 TC 3: 2008-10-06 06:39 Mt. Lemmon Survey: 3.8–4.4 m (12–14 ft) 30.72: 2008-10-07 02:45 20:05: 20.9 N, 31.8 E Nubian Desert in ...
The bottom of this size range, 20 m (66 ft) corresponds to the average size of an asteroid with the smallest impact energy (1 megaton) considered for impact hazard ratings on the Torino scale. [ 12 ] 20 m (66 ft) is also about the size of the Chelyabinsk meteor , which produced a meteor ending in an airburst briefly brighter than the Sun that ...
Asteroid 2025 BR2, with JPL describes as an "airplane-size" space rock about 67 feet long, is expected to pass within 3.21 million miles of Earth, while another asteroid, 2015 DJ155 – two-and-a ...
The head of planetary defense at the European Space Agency discusses 2024 YR4, an asteroid with a small chance of striking Earth eight years from now.
Update: The odds of asteroid 2024 YR4 striking Earth in 2032 have fallen to 1.5%, NASA announced Wednesday. Read the latest. The risk that an increasingly ominous asteroid dubbed 2024 YR4 will ...
2024 YR 4 is an asteroid with an estimated diameter of 40 to 90 metres (130 to 300 ft) that is classified as an Apollo-type (Earth-crossing) near-Earth object.From 27 January to 20 February 2025, it had an impact rating of 3 on the Torino scale, with a maximum estimated probability of 3.1% that it would impact Earth on 22 December 2032.
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 ...