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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.
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At nearly 1.5 kilometers wide, it's the largest such asteroid discovered in eight years. Robin George Andrews (31 October 2022). " 'Planet Killer' Asteroid Spotted That Poses Distant Risk to Earth". The New York Times. Ashley Strickland (31 October 2022). " 'Planet killer' asteroid spotted hiding in the sun's glare". CNN.
The 7,600-foot long celestial object has earned the nickname ‘planet killer,’ flying at speeds of 58,000 miles per hour.
2019 OK [a] is a near-Earth asteroid noted for its sudden, surprise discovery on the day before it flew by at approximately 70,000 km (43,000 mi) in 2019. [4] The object's size is estimated at 57 to 130 metres (187 to 426 ft) across, the closest asteroid of such size discovered in 2019. [5]
The asteroid discovered in 2020 is set to make an astronomically close approach early on Wednesday more than 1.37 million miles from our planet, more than five times the average distance to the Moon.
2023 DW is a near-Earth asteroid of the Aten group.It is approximately 50 meters (160 feet) in diameter, roughly the size of the asteroid that caused the Tunguska event, [a] and was discovered by Georges Attard and Alain Maury, from the MAP (Maury/Attard/Parrott) asteroid search program in San Pedro de Atacama on 26 February 2023, when it was 0.07 AU (10 million km) from Earth. [1]
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