collarian

An asteroid at least 500 feet long will make a rare close pass by Earth next week, but there is no chance of an impact, scientists reported Thursday.

The object, known as 2007 TU24, is expected to whiz by Earth on Tuesday with its closest approach at 334,000 miles, or about 1.4 times the distance of Earth to the moon.

The nighttime encounter should be bright enough for medium-sized telescopes to get a glimpse, said Don Yeomans, manager of the Near-Earth Object Program Office at NASA's Jet Propulsion Laboratory, which tracks potentially dangerous space rocks.

However, next week's asteroid pass "has no chance of hitting, or affecting, Earth," Yeomans said.

An actual collision of a similar-sized object with Earth occurs on average every 37,000 years.

Spotted last October by the NASA-funded Catalina Sky Survey in Arizona, 2007 TU24 is estimated to be between 500 feet and 2,000 feet long. The next time an asteroid this size will fly this close to Earth will be in 2027.

Scientists plan to point the Goldstone radar telescope in California and the Arecibo radar telescope in Puerto Rico at the asteroid and observe its path before and after its closest approach to Earth. Researchers will use instruments to measure its rotation and composition.

The 2007 TU24 rendezvous comes a day before another asteroid is projected to pass close to Mars.

Scientists have effectively ruled out a collision between the Red Planet and the asteroid 2007 WD5, estimating it will pass at a distance of more than 16,000 miles from the Martian surface. Initial observations of the Mars-bound asteroid put the odds of an impact at 1 in 25, but scientists later dropped the odds to 1 in 10,000.

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Gole_Orkide

Khodesham Goftan Taa Nohomeh Bahman Maahe Emsaal,.

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Gole_Orkide

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iranmp3

hala age gravity earth baes beshe ke in betarafe zamin jaz beshe + gravity zamin na hamahang hast + on noghtei ke nazdik mishe be zamin + hameye ina ro moahsebe kadan........

baba ba yedone nuclear bomb bezanid motelashish konid bere eikaresh digeh

amrica poole ezafy base inkara ziad dareh

iranmp3

150-610 meter i suppose there are definitely high rises in qatar !!!

collarian

Az inja khodetoon mitoonid mohasebe konid, che tarikhi be zamin nazdiktar mishe:

JPL Small-Body Database Browser

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iranmp3

az dama ke nemigzareh

collarian

man ke hesab kardam, mishe 30 january 0.0047 AU ke mishe taghriban 437100 mile, be nazdiktarin had mirese.

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collarian

Scientists at NASA's Jet Propulsion Laboratory in Pasadena, Calif., have obtained the first images of asteroid 2007 TU24 using high-resolution radar data. The data indicate the asteroid is somewhat asymmetrical in shape, with a diameter roughly 250 meters (800 feet) in size. Asteroid 2007 TU24 will pass within 1.4 lunar distances, or 538,000 kilometers (334,000 miles), of Earth on Jan. 29 at 12:33 a.m. Pacific time (3:33 a.m. Eastern time).

"With these first radar observations finished, we can guarantee that next week's 1.4-lunar-distance approach is the closest until at least the end of the next century," said Steve Ostro, JPL astronomer and principal investigator for the project. "It is also the asteroid's closest Earth approach for more than 2,000 years."

Scientists at NASA's Near-Earth Object Program Office at JPL have determined that there is no possibility of an impact with Earth in the foreseeable future.

Asteroid 2007 TU24 was discovered by the NASA-sponsored Catalina Sky Survey on Oct. 11, 2007. The first radar detection of the asteroid was acquired on Jan. 23 using the Goldstone 70-meter (230-foot) antenna. The Goldstone antenna is part of NASA's Deep Space Network Goldstone station in Southern California's Mojave Desert. Goldstone's 70-meter diameter (230-foot) antenna is capable of tracking a spacecraft traveling more than 16 billion kilometers (10 billion miles) from Earth. The surface of the 70-meter reflector must remain accurate within a fraction of the signal wavelength, meaning that the precision across the 3,850-square-meter (41,400-square-foot) surface is maintained within one centimeter (0.4 inch).

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