Blue asteroids – uncommon for outer space.
Even more bizarre than the thoughts of astronomers, the asteroid 3200 Phaethon sprinkles its ruins the Earth, these fragments can be seen in the stream stargazing Hominids. The Phaeton may be a fragment of a larger celestial body with the name Pallas.
Bizarre rock rare blue color, which acts as a comet and appears to be responsible for the annual Geminid meteor shower, last year made the closest flyby near the Earth, giving astronomers the ability to study the object. They found that the asteroid is even more strange than expected.
Asteroid 3200 Phaethon is a space object with an extremely eccentric orbit that passes over the Sun, and then beyond the orbit of Mars. One revolution takes about 1.4 earth years. This kind of orbit is more typical of comets than asteroids.
But, in that time, Phaethon acts like a comet, it is not like a comet. When comets approach the sun, they form a cloud and a long tail of dust and gas. Phaeton, however, always looks like a tiny speck floating in space.
Teddy Coach, graduate student, University of Arizona, who led the international effort to study the Phaeton during the flight, presented the results of his team here at the 50th annual meeting of Division of planetary Sciences of the American astronomical society (October 23). The coach and his colleagues observed the close approach of Phaethon, using the NASA infrared telescope on Mauna Kea in Hawaii and Tillinghast telescope on mount Hopkins in Arizona.
One of their results can overturn existing theory about the origin of the Phaeton. Astronomers have long suspected that the Phaeton is a fragment of a much larger blue asteroid Pallas. “However, the albedo of Pallas [or reflectivity] is about two times larger than we found for the albedo of a Phaeton,” said the Coach. With albedo of about 8 percent, Phaethon is approximately two times brighter than Pallas, said the Coach.
The researchers also found that the surface of the Phaeton the same blue around, which means that the object was “evenly burnt” or “cooked” by the sun. The coach said that the blue color of the chaise indicates that the rock has undergone intense heat. While traveling chaise around the sun it is heated to a temperature of 1500 degrees Fahrenheit (800 degrees Celsius), which “is so high that the metals on the surface turn into slime”, – he said.
Asteroids, like Phaeton, are rocky objects that do not behave like comets when approaching the sun, and astronomers do not understand how the Phaeton can create Starfall Hominids. Before the discovery of Phaethon in 1983, astronomers had no idea where they came from Hominids. Observing that the orbit of Phaethon was consistent with the traces of debris, which cause the annual meteor shower, astronomers have determined that all-the Phaeton should be their source.
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