NASA’s ScienceCast program reports on the upcoming close fly-by of asteroid 2012-DA14:

On Feb. 15th an asteroid about half the size of a football field will fly past Earth closer than many man-made satellites. Since regular sky surveys began in the 1990s, astronomers have never seen an object so big come so close to our planet.

More at Near-Earth Asteroid 2012 DA14 to make extremely close approach in February 2013 – The Watchers – Aug.22.12.