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This is a list of asteroids that have impacted Earth after discovery and orbit calculation that predicted the impact in advance. As of October 2024, all of the asteroids with predicted impacts were under 5 m (16 ft) in size that were discovered just hours before impact, and burned up in the atmosphere as meteors. Asteroid.
C-type (carbonaceous / ˌkɑːrbəˈneɪʃəs /) asteroids are the most common variety, forming around 75% of known asteroids. [1] They are volatile-rich and distinguished by a very low albedo because their composition includes a large amount of carbon, in addition to rocks and minerals. They have an average density of about 1.7 g/cm3.
469219 Kamoʻoalewa (/ kəˌmoʊʔoʊəˈlɛvə /), [6] provisionally designated 2016 HO3, is a very small asteroid, fast rotator and near-Earth object of the Apollo group, approximately 40–100 meters (130–330 feet) in diameter. At present it is a quasi-satellite of Earth, and currently the second-smallest, closest, and most stable known ...
Outside the top four, the ranking of all the asteroids is uncertain, as there is a great deal of overlap among the estimates. The largest asteroids with an accurately measured mass, because they have been studied by the probe Dawn, are 1 Ceres with a mass of (939.3 ± 0.5) × 10 18 kg, and 4 Vesta at (259.076 ± 0.001) × 10 18 kg.
162173 Ryugu (provisional designation 1999 JU 3) is a near-Earth object and a potentially hazardous asteroid of the Apollo group.It measures approximately 900 metres (3,000 ft) in diameter and is a dark object of the rare spectral type Cb, [11] with qualities of both a C-type asteroid and a B-type asteroid.
18610 Arthurdent (provisional designation 1998 CC 2) is an asteroid from the middle region of the asteroid belt, approximately 3.5 kilometers in diameter. It was discovered on 7 February 1998, by a team of astronomers including Felix Hormuth at Starkenburg Observatory in Heppenheim, Germany. [ 5 ]
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The Apollo asteroids are a group of near-Earth asteroids named after 1862 Apollo, discovered by German astronomer Karl Reinmuth in the 1930s. They are Earth-crossing asteroids that have an orbital semi-major axis greater than that of the Earth (a > 1 AU) but perihelion distances less than the Earth's aphelion distance (q < 1.017 AU). [1][2]