Nun, der Himmel in Form von Toutatis himself wird uns knapp nicht auf den Kopf fallen, aber heute sehr, sehr nah (4 X Distanz Erde-Mond) kommen.
Siehe hier: http://neo.jpl.nasa.gov/
Sofern ich sehe, ist (wieder einmal) keine Sonde in der Nähe, um genaue Daten zu registrieren.

Ich zitiere:
Toutatis, a potato-shaped asteroid about 4.6 km (3 miles) in its longest extent, will pass within 1,550,000 km (963,000 miles) of the Earth's center on Wednesday, September 29, 2004 - reaching its closest approach at 13:35:28 GMT (06:35:28 PDT). This is roughly four times the distance from the Earth to the moon and closer than this asteroid has come to Earth since at least the twelfth century. Toutatis will not pass this closely again for the next 500 years. The passage is the closest Earth approach this century for a known asteroid of this size. Because of an extensive set of optical and radar observations, the orbit for Toutatis is one of the best determined of any asteroid and there is no chance that this object will collide with the Earth during this encounter - or any other encounter for at least 5 centuries.