The Telegraph by Mike Wright 12 October 2017
An asteroid the size of a house was being watched carefully this morning by astrophysicists as it hurtled “damn close” to Earth.
The large space rock, named 2012 TC4, was first spotted five years ago by the Pan-STARRS telescope at the Haleakala Observatory, in Hawaii, before disappearing as it orbits the sun. It then reemerged in July on a trajectory well inside our lunar orbit.
Scientists said the asteroid swung by Earth about 6:42am BST, passing over Antarctica, and posed no threat.
However it did present space agencies with a rare opportunity to test the planet’s space defences and wargame what they would do if a larger, more threatening asteroid was detected heading straight for Earth.
How close did TC4 come to Earth?
TC4 is between 50 to 100ft in diameter and travelling through space at roughly 16,000 mph - 4.5 miles a second. It is past within 27,000 miles of Antarctica.
More:
http://www.telegraph.co.uk/news/0/asteroid-2012-tc4-pass-damn-close-earth-tomorrow-give-rare-chance/
