While we haven't witnessed an asteroid directly hitting Uranus, it's highly likely that it has been hit by asteroids and comets in the past.

Here's why:

* Uranus's location: It resides in the outer solar system, where there's a much higher density of icy bodies and debris. This increases the probability of impacts.

* Evidence of impacts: We see evidence of past impacts on other planets like Mars and the Moon, which are also in the outer solar system.

* Uranus's rings: The rings of Uranus likely formed from debris created by past impacts.

While we haven't observed a direct impact, the presence of rings and the general dynamics of the outer solar system strongly suggest that Uranus has been hit by asteroids and comets throughout its history.