http://www.independent.co.uk/news/science/asteroid-worth-35-trillion-set-to-pass-earth-on-sunday-and-you-can-watch-it-live-10398708.html
An asteroid believed to contain a platinum core worth £3.5 trillion is
expected to pass Earth at around 10pm on Sunday, attracting the
interest of asteroid-mining companies.
The platinum-filled space rock which is also thought to contain other
precious materials is only around half a mile wide, but its metallic
core is estimated to weigh 100 million tonnes making it hugely
valuable.
Asteroid 2011 UW-158 will pass 1.5 million miles away from Earth,
meaning it will be 30 times closer than our nearest planet, according
to Slooh Community Observatory.