Asteroid UW-158 is set to wizz past Earth today, carrying an estimated five trillion dollars in platinum.

Spectroscopic analysis has revealed the composition of the asteroid, and made it a prime target for future asteroid-mining missions. It is approximately 452 metres by 1,011 metres in size. If the analysis is correct, it could be carrying an astonishing 90 million tons of platinum. It will swing past Earth at a distance of 2.4 million km, and will not be visible to the naked eye.

There will be a live broadcast from Slooh of the flyby, with astronomers on hand to answer your questions. The broadcast will begin at 5pm EST today, and you can tune in here: