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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.
The 7,600-foot long celestial object has earned the nickname ‘planet killer,’ flying at speeds of 58,000 miles per hour
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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.
Asteroids orbiting between Earth and the sun are especially hard to find, but NASA can't deflect hazardous space rocks if astronomers don't spot them.
(669555) 2012 YQ 1 is a sub-kilometer asteroid, classified as a near-Earth object and a potentially hazardous asteroid of the Apollo group, approximately 200 meters in diameter. It was first observed on 19 December 2012, by astronomers Andrey Oreshko and Timur Kryachko at the Elena Remote Observatory ( G32 ) located in the Chilean Atacama desert.
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2024 RW 1, previously known under its provisional designation CAQTDL2, [5] was a 1-meter-sized asteroid or meteoroid that struck the Earth's atmosphere and burned up harmlessly on September 5, 2024, at around 12:40 a.m. PHT (September 4, 16:40 UTC) above the western Pacific Ocean near Cagayan, Philippines.