potentially hazardous asteroid

A potentially hazardous object (PHO) is a near-Earth asteroid or comet with an orbit such that it has the potential to make close approaches to the Earth and is of a size large enough to cause significant regional damage in the event of impact.

For more information about potentially hazardous asteroid check the Wikipedia article here

ZME Science posts about potentially hazardous asteroid

Huge asteroid will ‘barely miss’ Earth

Fri, Jun 15, 2012

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A huge asteroid will make a ‘cosmic brush’ on Earth, closing in on our planet at a distance of only a few million kilometers. The massive asteroid, named 2012 LZ1, will buzz Earth Thursday, and amateur astronomers without any equipment can watch the flyby on the Slooh Space Camera’s website. It will be a close [...]

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