A newly discovered asteroid designated 2017 AG13 is about to fly by the Earth tonight at 00:47 GMT (07:47 EST). It whizzes past at half the distance of the Moon at 10 miles per second. This is a very fast speed relative to the Earth. Estimated to be around 11 – 34 meters in diameter which is roughly the same size as the asteroid that struck Chelyabinsk, Russia in 2013. This asteroid was only discovered on Saturday 07th January by scientists at the Catalina Sky Survey. The asteroid is quite dim so will be difficult to observe for amateur astronomers especially given the relative speed. Click the diagram below for an enlarged orbit diagram.