asteriod

An asteroid half the size of a football field, in the vicinity of the earth totals on Friday, come closer than many weather satellites, but there is absolutely no chance that the space rock will hit the planet, NASA says.
Asteroid 2012 DA14 will approach within 17,200 miles of Earth when the zips of the planet on Friday (Feb. 15). It is 5,000 miles closer than the ring of weather, communications and GPS navigation satellites, the earth, but it is not a power threat, assuring NASA scientist.
After detailed observations of the 150-foot-2012 DA14 since its discovery last year, “there is no chance that the asteroid could be on a collision course with the earth be,” NASA officials said in a statement.
“There is no chance that the asteroid could be on a collision course with the Earth.”- NASA officials.But the space rock meeting marks the next ever known Earth flyby of an asteroid the size of 2012 DA14, with NASA scientists and astronomers from around the world are preparing to participate in the benefits of the event to take a closer look, like asteroids work . One study in particular trying to determine exactly how the asteroid rotates on its axis.
“Knowing the direction of the spin is important to predict accurately determine the way forward, and thus how close they come to Earth in the next few years,” study leader Michael Busch of the National Radio Astronomy Observatory (NRAO) said in a statement.

Busch and his colleagues are determined by two large radio telescopes in New Mexico, Very Large Array and Very Long Baseline Array, together with NASA Goldstone radar antenna in California in an attempt to the direction of the asteroid 2012 EN spin.

The telescopes are looking for so-called “points” of radio signals reflected by the uneven surface of asteroids and then compare the observatory detected spots initially to determine the spin direction.Knowledge of an asteroid spin is the key to understanding how a space rock radiates heat from absorbed sunlight over time. This in turn allows astronomers to project how an asteroid path change over long periods, as they orbit the sun.