In this beautiful tracking video below, you're looking at Asteroid 2013 XY8 which was captured buzzing by our planet on December 7th:

Don't scoff at the size of that dot. It's estimated to be up to 230 feet, which is about the same size of a space shuttle, or half a football field. And it came pretty darned close to planet earth too (about 470,000 miles). The next time you see it, it'll be in 2072.

[The Virtual Telescope Project via Slate]