9951 Tyrannosaurus is an S-type main belt asteroid. It orbits the Sun once every 3.78 years.
Discovered on November 15, 1990 by E. W. Elst it was given the provisional designation "1990 VK5". On November 21, 2002 it was renamed "Tyrannosaurus" after Tyrannosaurus, a genus of large carnivorous dinosaur of the late Cretaceous.