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00:00:30 1 List
00:00:54 2 See also
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Speaking Rate: 0.7346634089702653
Voice name: en-US-Wavenet-A
"I cannot teach anybody anything, I can only make them think."
- Socrates
SUMMARY
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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 ( 1 AU) but perihelion distances less than the Earth's aphelion distance (q 1.017 AU).As of December 2018 the number of known Apollo asteroids is 10,485, making the class the largest group of near-Earth objects (cf. the Aten, Amor and Atira asteroids), of which 1,409 are numbered (asteroids are not numbered until they have been observed at two or more oppositions), and 1,648 are identified as potentially hazardous asteroids.The closer their semi-major axis is to Earth's, the less eccentricity is needed for the orbits to cross. The February 15, 2013 Chelyabinsk meteor that exploded over the city of Chelyabinsk in the southern Urals region of Russia, injuring an estimated 1000 people with flying glass from broken windows, was an Apollo class asteroid.
