http://www.newsweek.com/potentially-hazardous-asteroid-passing-earth-watch-livestream-4000ft-nasa-138971-2001-cb21-1676719

An asteroid that could have a diameter as great as 4265 feet is headed towards a close approach to Earth on March 4. Though asteroid (138971) 2001 CB21 will safely miss our planet, that doesn't mean skywatchers will miss out.

The Virtual Telescope Project 2.0 is giving space enthusiasts the opportunity to observe (138971) 2001 CB21 as it passes Earth at a distance of around 3 million miles safely from the comfort of their own home.