MOSCOW, December 28 – RIA Novosti. about 11 dangerous approaches to the Earth with asteroids predicted by 2050, warns the Russian Emergencies Ministry.
© NASA / JPL-Caltech
For large space objects were asteroids with a diameter of more than a kilometer. On Earth, we know of about 120 very large asteroid craters, Russia is the largest of them – Popigai Basin in the north of the Siberian platform. The size of the internal crater is 75 kilometers, the external – 100 kilometers; accident occurred about 36 million years ago.
The Fall of a large meteorite, some scientists explain the mass extinction of living organisms (about 250 million years ago). Another meteorite, according to the hypothesis of Luis Alvarez, led to the extinction of the dinosaurs.
The relatively smaller objects also pose a serious threat to the world because of their explosions near populated areas as a result of the shock wave and heat may lead to considerable damage, commensurate with defeat the atomic explosion. Only by chance fall into an unpopulated area of the Tunguska meteorite in 1908 has not caused such effects.
“to 2050 is projected to 11 encounters with asteroids to distances smaller than the average radius of the lunar orbit (385,000 kilometers). The sizes of these objects are in the range of seven to 945 meters, “- said in a forecast of the Center” Antistikhiya “EMERCOM of Russia.Near the time closer to the objects of this category will be held on October 12, 2017 an asteroid 2012TS4, which will be held at a distance of 115,000 kilometers from Earth at a speed of 6.8 kilometers per second. The diameter of the asteroid is 17 meters.
The most potentially dangerous asteroid is Apofes (99942 Apophis), having a diameter of 393 meters. Thirteenth April 2029 he will approach the Earth at a distance of 38.4 thousand kilometers, which is close to the height of the orbit of geostationary satellites (35.8 thousand kilometers). The speed of convergence will be 7.42 kilometers per second.
No comments:
Post a Comment