Out in the main asteroid belt between Mars and Jupiter orbits a rock called 6478 Gault. It's approximately 4–9 kilometers across (it can be hard to obtain the exact sizes of asteroids),which is pretty typical. It's orbit is a diminutive unusual in that its more elliptical and tipped than for most asteroids, but that's no big deal.What is a big deal is that it appears to be tearing itself apart.
Source: blastr.com