The first asteroid, Ceres, is discovered.
Heinrich Olbers, German astronomer, discovered an asteroid orbiting between Mars and Jupiter, He believed it to be a planet and named it Pallas after Pallas Athena
A. Graham discovered asteroid #9: Metis.
H. Goldschmidt discovered asteroid #45, Eugenia.
J.C. Watson discovered asteroid #121, Hermione.
G. Neujmin discovered asteroid #1386 Storeria.
T. Smirnova, Russian astronomer, discovered asteroid #2345 Fucik.
Luis Alvarez and colleagues publish the first paper linking the final dinosaur extinction to a massive asteroid impact
E. Bowell discovered asteroid #2531 Cambridge.
The Chixculub impact crater in Mexico, now buried deep below ground, is finally identified and tied to the impact that killed the dinosaurs
US Congress-appointed panel proposes Spaceguard program to search for all near-Earth asteroids larger than 1 kilometre across within 10 years
The first discovery is made of an asteroid with an orbit computed to have a possibility of striking Earth
An asteroid is discovered that still has highest known possibility of impact. 1950 DA has 1-in-600 chance of striking Earth in 2880
It is found that the Yarkovsky Effect can significantly alter asteroid orbits and therefore could be used to move one out of harm's way, just by spray-painting it white. The Yarkovsky Effect causes thrust, because of imbalances between solar energy reaching the object and heat being radiated out
Apophis will make the closest approach to Earth ever predicted for a sizable asteroid on 13 April. It will come close enough to be visible to the naked eye and the Earth's gravity will change its orbit
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