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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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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]
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.
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The reality about menacing asteroids coming to destroy Earth in the modern-day is, perhaps surprisingly, not too scary.Yes, the doomsayers thrive online, but the prognosis is encouraging ...
(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.