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By the Earth flies asteroid 400 meters.
In November 2011 near-Earth asteroid will fly great.
According to preliminary calculations, the asteroid 2005 YU55 will be held at a distance less than the distance from Earth to the Moon - 300,000 km, which increases the risk of collision.
Experts believe that this is now one of the most dangerous for the Earth's celestial bodies.
Asteroid 2005 YU55 was opened under the project Spacewatch, implemented by the efforts of the American University of Arizona Lunar and laboratory studies of the city of Tucson (USA) 28 December 2005, and included in the list of potentially dangerous space bodies. The diameter of the asteroid about 400 meters, it has a circular orbit motion and intersects with the Earth every 30 years, but this time the 2005 YU55 fit unusually close to Earth.
According to preliminary data, the approach of an asteroid is expected on November 8.
so close encounter with the object of that size last occurred in 1976. Then an asteroid approached Earth at half the distance than from the Moon to the Earth.
This year the community of professional astronomers intend to observe the 2005 YU55 with radar, optical and infrared telescopes. In extreme close-2005 YU55 to Earth, researchers promise to make a detailed three-dimensional reconstruction of the space object. Amateur astronomers can also be seen flying past the Earth 2005 YU55 in conventional telescopes.
of today's most dangerous by the share of the probability of an impact on our planet is the asteroid Apophis.
Its diameter is about 300 m, and the mass estimated at 25 million tonnes is anticipated that in 2029 he will fly below the location of geostationary satellites, and in 2036 with a significant probability for such an event, will face the planet.