Two asteroids are passing close by Earth today. The second space rock will be less than 48,000 miles away — about one-fifth the distance to the moon.There is no danger of impact, says NASA, even though at closest approach asteroid 2010 RF12, the afternoon visitor, will be less than 48,000 miles away. The moon, in comparison, averages about 239,000 miles away.
The asteroid is estimated to be between 20 feet and 46 feet in diameter.
Asteroid 2010 RX30, which is between 32 and 65 feet in diameter, flew by at 5:51 a.m. EDT, passing about 154,000 miles during its closest approach to Earth. Both space rocks were discovered on Sunday by the University of Arizona’s Catalina Sky Survey.

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