A newly-discovered car-sized asteroid will  fly past Earth early Tuesday. The asteroid, 2010 TD54, will make its  closest approach to Earth at 6:51 EDT a.m. (3:51 a.m. PDT). Image  credit: NASA/JPL 
October 11, 2010
 PASADENA, Calif. -- A small asteroid will fly past Earth early Tuesday  within the Earth-moon system. The asteroid, 2010 TD54, will have its  closest approach to Earth's surface  at an altitude of about 45,000  kilometers (27,960 miles) at 6:50 EDT a.m. (3:50 a.m. PDT).  At that  time, the asteroid will be over southeastern Asia in the vicinity of  Singapore. During its flyby, Asteroid 2010 TD54 has zero probability of  impacting Earth.  A telescope of the NASA-sponsored Catalina Sky Survey  north of Tucson, Arizona discovered 2010 TD54 on Oct. 9 at (12:55 a.m.  PDT) during routine monitoring of the skies. 2010 TD54 is estimated to be about 5 to 10 meters (16 to 33 feet) wide. Due to its small size, the asteroid would require a telescope of moderate size to be viewed. A five-meter-sized near-Earth asteroid from the undiscovered population of about 30 million would be expected to pass daily within a lunar distance, and one might strike Earth's atmosphere about every 2 years on average. If an asteroid of the size of 2010 TD54 were to enter Earth's atmosphere, it would be expected to burn up high in the atmosphere and cause no damage to Earth's surface.
More info on car-sized asteroid
 
