Apollo asteroid
Videos
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 sem
Common orbital subgroups of Near-Earth Objects (NEOs)
Potentially hazardous object
Videos
A potentially hazardous object is a near-Earth object – either an asteroid or a comet – with an orbit that can make close approaches to the Earth and which is large enough to cause significant regiona
Apollo asteroid
…1,742 are numbered (asteroids are not numbered until they have been observed at two or more oppositions), 81 are named, and 2,130 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 Chelyabinsk meteor, that exploded over…
Radar image of the 350-meter PHO (308635) 2005 YU55
Pingualuit aerial 2007