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Scientists estimate that several dozen asteroids in the 6–12 m (20–39 ft) size range fly by Earth at a distance closer than the moon every year, but only a fraction of these are actually detected. [1] [2] See also lists dedicated to specific years such as List of asteroid close approaches to Earth in 2023.
An example list of near-Earth asteroids that passed more than 1 lunar distance (384,400 km or 0.00256 AU) from Earth in 2008. 2007 TU 24 (~250 meters in diameter) passed 1.44 LD (554,000 km) from Earth on January 29, 2008. 2008 CE 22 (~18 meters in diameter) passed between 0.9997 and 1.0023 LD (384,300 to 385,300 km) from Earth on February 6, 2008.
The first asteroid flyby within 1 LD of Earth in 2022 was asteroid 2021 YK (10–20 meters in diameter), which was observed on 27 December 2021 04:40 UT (when it was about 3.8 million km from Earth) and passed 0.49 LD (190 thousand km) from Earth on 2 January 2022. The largest asteroid to pass within 1 LD of Earth in 2022 was 2022 TM 2 with an ...
But even at its closest, it's expected to pass by Earth at a distance more than seven times that of the distance between Earth and the moon. Asteroid 2008 OS7 was first discovered in 2008.
Due to its Earth-like orbit, the object might be of artificial origin or lunar ejecta. [1] However, visible spectroscopy obtained with the Gran Telescopio Canarias shows that it is an asteroid. [9] The closest approach to Earth in 2022 was 26 June 2022 at roughly 812,200 km (504,700 mi) when it had a relative velocity of 0.96 km/s (2,100 mph). [3]
An asteroid called 2020 CD3 was bound to Earth for several years before leaving the planet's orbit in 2020 and another called 2022 NX1 became a mini-moon of Earth in 1981 and 2022 and will return ...
Earth has a new “mini-moon” after an asteroid has joined our orbit. ... The 2024 in its name refers to its year of discovery. ... as in the case of 2022 NX1 – which joined Earth as a mini ...
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.