Asteroids and Asteroid Hazards

Asteroids and Asteroid Hazards

Сообщение HainanWel.com(e)! » 03 июн 2011, 16:28

Asteroid 2009 BD will sweep today between the Moon and the Earth at a speed of 11.2 kilometers per second
Thursday, 02 June 2011 05:49
NASA warns, that the asteroid 2009 BD will sweep today at a distance of 345,000 kilometers from Earth, ie inside the orbit of the Moon, which happens rarely. The diameter of the asteroid 2009 BD is 10 meters, velocity will be 11.2 kilometers per second. Despite this small size of asteroid 2009 BD, researchers from NASA estimated, that in the event of a fall to Earth releasing energy, equivalent to the explosion of 7.8 tons of TNT. Asteroid 2009 BD is asteroid, moving around the Sun almost in tandem with Earth (see a photo). Orbit of asteroid 2009 BD is almost identical to Earth's orbit. Earth's gravity could capture asteroids before they begin delineate a giant spiral around the Earth. At the moment, little is known about the asteroid 2009 BD, despite the fact, that the asteroid 2009 BD was on 25 January 2009 at a distance of 644,000 kilometers from Earth. Eventually it will be possible to trace the orbit of asteroid 2009 BD with greater accuracy. Four known asteroids, which becomes a temporary "Moons": 2003 YN107, 2004 GU9, 2001 GO2, 2002 AA29. All they can routinely come closer to Earth.

FOR PHOTOS CLICK HERE: http://hainanwel.com/en/unusual-world/5 ... 09-bd.html
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Re: Asteroid Hazards

Сообщение HainanWel.com(e)! » 24 июн 2011, 18:59

Asteroid 2011 MD will fly just 12 thousand kilometers (7,500 miles) from the Earth's surface
Friday, 24 June 2011 11:41
FOR PHOTOS CLICK HERE: http://hainanwel.com/en/unusual-world/6 ... 11-md.html
Representatives of NASA announced, that the open day before the asteroid 2011 MD will fly on June 27, 2011 at a short distance from the Earth's surface- up to 12 thousand kilometers (7,500 miles). It is estimated, that asteroid 2011 MD should fly over the southern Pacific Ocean-over the coast of Antarctica at 9:30 am. It is hard to tell, how will behave asteroid 2011 MD, it can fly farther into space (most likely), could become a satellite of the Earth, and may fall to Earth. In the event of a collision with the Earth - releasing energy, equivalent to tens of explosion tons of TNT, as the size of the asteroid 2011 MD is about 13 meters (on the currently available data). Of particular concern of scientists is the fact of crossing asteroid's trajectory with the paths of navigation and the military satellites.
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Re: Asteroid Hazards

Сообщение HainanWel.com(e)! » 30 июн 2011, 01:10

Estimate of the impact probability of 2011 MD with Earth
Friday, 24 June 2011 19:29

http://hainanwel.com/en/unusual-world/6 ... -2011.html

According to NASA, on June 27, 2011 near Earth will fly asteroid 2011 MD. Although asteroid 2011 MD many media have already named the 18-meter asteroid, its adjusted size is only 8 meters, and the calculated mass of the asteroid is 810 tons. Asteroid 2011 MD was discovered only on June 22, 2011, so very little is known about its orbit, the Earth's gravity well can greatly change the asteroid's orbit, but it is expected, that the asteroid will pass near Earth at a distance of 12,000 kilometers.

It is very difficult to calculate the exact probability of a impact of asteroid 2011 MD with Earth, scientists still have only preliminary data. Let's try to explain them in simple examples.

Asteroids, or so-called minor planets have been discovered only in the 19th century. The first asteroid Ceres discovered by Italian astronomer Giuseppe Piazzi on the night of January 1, 1801. The size of the asteroid Ceres is approximately 950 km, which made possible the fact of his discovery at that time. After that, thousands of asteroids have been discovered very different sizes, by the way, a significant portion of them opened Soviet astronomers.

It is now established, that the solar system is a huge number of comets and asteroids, but most of them (about 98%) is concentrated in the main asteroid beltб that lies between Mars and Jupiter, the Kuiper belt and Oort cloud, which are pretty far beyond the Earth's orbit. Therefore, the Earth encounters with asteroids less than, for example, Mars.

But there are quite a few asteroids, which form the so-called Group of Apollo, the orbits that intersect Earth's orbit, and that these asteroids are a potential collision risk to Earth. There is also a danger on the part of the asteroids whose orbits are inside the orbit of the Earth- is the so-called Group of Aton, or beyond the orbit of the Earth, but far from it – is the so-called group of the Amur.

Astronomers have agreed to call asteroids, that approach the Earth at a distance of less than 7.48 million km-are a potentially dangerous objects, provided that the asteroid has a size of at least 150 meters, as it is believed that asteroids are smaller in the case of entry into Earth's atmosphere begin to disintegrate in the Earth's atmosphere and serious damage can not cause.

Thus, the asteroid 2011 MD only satisfies the first condition of the potentially hazardous asteroid, as if its entry into the atmosphere- will a very high probability of its destruction, but NASA specialists have calculated, that if the asteroid fragments will reach the Earth's surface, releasing energy equivalent to energy released during the explosion of 12 tons of TNT.

In order to more accurately estimate the probability of impact, use several scales. The best known is the Torino Scale, in which, depending on the asteroid, its mass and velocity, it is assigned a score - from 0 to 10, with asteroids scored 0 points are not likely to impact with the Earth and asteroids scored 10 points, will cause catastrophic destruction of the vast areas of the planet.

Asteroid 2011 MD, according to NASA, scored 0 points. Thus, according to representatives of NASA, the probability of impact is virtually zero (the exact probability of impact is estimated at 0.0066).

But the danger of this asteroid is still there, primarily for satellites. Also, some scientists warn, that such small asteroids before reaching the Earth's surface would disintegrate in the atmosphere, possibly with an explosion, such as air explosions can cause false inclusion of warning systems for nuclear attacks in nuclear countries.

So in 1996 the Parliamentary Assembly of the Council of Europe adopted a resolution indicating about the real danger to Earth from asteroids and comets, which called on all governments to support European research. On the basis of this resolution was created International Association "Space Guard", whose main goal is to provide service monitoring and tracking asteroids and comets, that approach to Earth.

In the U.S., monitoring the asteroid passes through several programs, of particular note LINEAR (Lincoln Near-Earth Asteroid Research), implemented by experts in the Lincoln Laboratory Sokkoro (New Mexico), with the assistance of the U.S. Air Force and NEAT (Near Earth Asteroid Tracking).
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Re: Asteroid Hazards

Сообщение HainanWel.com(e)! » 30 июн 2011, 01:11

MOVIE of asteroid 2011 MD
Sunday, 26 June 2011 14:52
http://hainanwel.com/en/unusual-world/6 ... 11-md.html 

Rafael Ferrando, world-renowned discoverer of asteroids from Valencia, Spain, recorded the motion of asteroid 2011 MD in the night sky (see a video). Filming was done last night with 16-inch telescope. Recall, that the asteroid 2011 MD will approach tomorrow to the closest distance to Earth -is about 12,000 kilometers. VIDEO CAN BE VIEWED HERE: http://hainanwel.com/Asteroid 2011 MD.gif
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Re: Asteroid Hazards

Сообщение HainanWel.com(e)! » 12 июн 2012, 02:14

Space lasers will protect Earth from asteroids
Monday, 11 June 2012 17:52
http://hainanwel.com/en/unusual-world/1 ... asers.html

According to the Advances in Space Research, the best way to protect Earth from asteroids will be the location of many small satellites with lasers on Earth's orbit, which in their cumulative effect can change the trajectory of dangerous asteroids, vaporizing part of the substance on their surface. Scientists believe, that the number of laser beams from many small lasers focused at one point the asteroid, will be able to evaporate more material from its surface, than a single large laser, which launched into Earth orbit. In addition, for many low-powered lasers do not need a large and complicated cooling system, which is necessary for a high-power laser, so the use of near-Earth satellite constellation will be more economically advantageous than the use of a small number of high-power lasers. According to scientists, this project is already technically possible to implement in the near future.
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Re: Asteroids and Asteroid Hazards

Сообщение HainanWel.com(e)! » 26 сен 2012, 20:30

Asteroids were the source of water on Earth
Written by Administrator
Thursday, 12 July 2012 23:04
http://hainanwel.com/en/unusual-world/1 ... earth.html

A team led by Conel Alexander at the Carnegie Institution in Washington, DC reported, that the main suppliers of water on Earth were an asteroids, but were not a comets, as previously thought. This conclusion was made on the basis of a study of the isotopic composition of water in the fragments of carbonaceous chondrites, which formed as a result asteroids falling to Earth in the distant past. According to Konel Alexander, the isotopic composition of water, which was found inn these carbonaceous chondrites are very similar to the isotopic composition of water in the modern oceans, and very different from the isotopic composition of the substance of comets. Therefore, according to the scientist, the main source of water were asteroids located between Mars and Jupiter, because of the crust of Mars should contain the same amount of water, than the earth's crust.
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Re: Asteroids and Asteroid Hazards

Сообщение HainanWel.com(e)! » 26 сен 2012, 20:47

The Fund B 612 will seek a hazardous asteroids
Written by Administrator
Monday, 16 July 2012 19:59
http://hainanwel.com/en/unusual-world/1 ... roids.html

Private nonprofit Fund B 612 is sponsoring orbiting a powerful telescope, which is in the infrared and visible ranges will seek the asteroids, that have a nonzero probability of collision with Earth in the near future. This ambitious project headed by former astronauts and veterans of NASA, it is expected that from 2018 the new telescope will start its work in the near-solar orbit between the orbits of Earth and Venus.
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Re: Asteroids and Asteroid Hazards

Сообщение HainanWel.com(e)! » 07 окт 2012, 03:05

Asteroid TCT501 will fly on October 7, 2012 between the Earth and the Moon-PHOTO
Saturday, 06 October 2012 18:35
http://hainanwel.com/en/unusual-world/2 ... ct501.html

According to the official website of the observatory ISON-NM- on tomorrow, October 7, 2012, at 19:03 MSK between the Earth and the Moon, at a distance of 256,500 kilometers from Earth will fly potentially hazardous asteroid. The asteroid was discovered in a private observatory Tenagra (Tenagra Observatory) less than a day ago, so at this time, the object is located in the confirmation page of Minor Planet Center, this asteroid is given a provisional designation of TCT501. asteroid will pass within 256,500 miles from Earth, inside the orbit of the Moon. Diameter of asteroid TCT501 estimated at 25-50 meters.
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Re: Asteroids and Asteroid Hazards

Сообщение HainanWel.com(e)! » 12 окт 2012, 02:41

PHOTO OF TRACK: Asteroid 2012 TV will fly on October 7, 2012 at a distance of 269,080 km from Earth
Sunday, 07 October 2012 16:51

http://hainanwel.com/en/unusual-world/2 ... 12-tv.html


Yesterday we reported, that scientists of ISON-NM observatory was open potentially dangerous asteroid, which was given the temporary designation TCT501. Today, this asteroid was named 2012 TV, NASA scientists (NASA) calculated the trajectory of the asteroid 2012 TV (see the photo above), which is today, on October 7, 2012, at 15:04 UT will close to 269,080 kilometers away from Earth's surface , the risk of a collision is practically impossible. Diameter of asteroid 2012 TV is 40 meters.
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Re: Asteroids and Asteroid Hazards

Сообщение HainanWel.com(e)! » 12 окт 2012, 02:46

Roscosmos will set a radio beacon on the asteroid Apophis- VIDEO
Monday, 08 October 2012 12:49


The head of Roscosmos (the Russian Federal Space Agency), Vladimir Popovkin, said today, that Roscosmos plans to launch in 2020 to the potentially dangerous for the Earth asteroid Apophis a special spacecraft, which will set to the surface of the asteroid Apophis a radio beacon, which will accurately track the trajectory of the asteroid Apophis. 300-meter asteroid Apophis (2004 MN4) is potentially dangerous for the Earth, as in 2029 the asteroid Apophis (2004 MN4) will pass near Earth at a distance of about 36,000 kilometers, at the height of the geostationary satellites, and at the next encounter with the Earth in 2036, the asteroid Apophis (2004 MN4) can run with it. VIDEO: http://hainanwel.com/en/unusual-world/2 ... ophis.html
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