Monthly Archives: November 2011

A close encounter with an asteroid

Radar image of asteroid 2005 YU55

At this precise moment, 11:28pm UK time, asteroid 2005 YU55 is passing just 201,700 miles (324,600 kilometers) from the Earth, its closest approach for at least the last 200 years. [1]

It’s travelling at a speed of 30,680 miles (49,370 kilometres) per hour, which is 8.523 miles (13.71 kilometers) every second! [2] [3]

The Clay Center Observatory in Brookline, Massachusetts, is broadcasting a live video from their 25-inch telescope (see their Facebook post).  The Keck Observatory in Hawaii is also broadcasting a live video, available here and here (see their Facebook posts).

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