A very small (8 meter diameter) asteroid will pass within 90,000 kilometers of the Earth tomorrow night our time (AEST). There is no danger that 2010 RF12 will impact the Earth. It is a reminder however that there is one out there with our name on it (so to speak)!
An amateur astronomer Bernhard Haeusler has taken an animation of the asteroid which can be found here on his website.