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He approaches the ‘ asteroid Halloween : a diameter of about 500 meters is called 2015 TB145 and will pass on October 31 at 18.18 (Italian), about 500,000 km from the Earth , which is 1.3 times the distance of Moon . It will be visible from Italy especially the night before rapprochement. Of course, “ there is no danger of impact with our planet because the distance is safe,” he says astrophysicist Gianluca Masi , head of the Virtual Telescope. But, he adds, it will be an excellent opportunity to closely observe this asteroid.
According to NASA should be one of the best radar targets for this year and has scheduled observations with telescopes Green Bank and Arecibo . For another flyby of a known object, of this size, underlines the American space agency, will have to wait until 2027, when it will pass the asteroid 1999 AN10 .
“It will be an important approach – says Masi – when the minimum distance from Earth, the asteroid will be very bright , has magnitude 10, ie the range of binoculars and a small amateur telescope.” However Italy, adds, October 31 observation will not be easy, because the object is very low on the horizon and we will be the light of the moon that will bulky recently passed the stage full (Oct. 27). There will be better conditions the night before the closest approach, ie between 30 and 31 October, “when – explains astrophysicist – brightness of the asteroid will be 12 mag, but the reach of a good even amateur telescope with a diameter of between 15 to 20 centimeters. ” You can groped observation after 23.00, continues Masi, when TB145 2015 will be among the stars of the constellation of Orion . The only problem, says, “could be the Moon will still be very bright.”
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