And they say that once they have found out more about the asteroid, it's likely it will become even less of a threat.
They were responding to reports that the 2.6 billion tonne piece of rock could strike the Earth in 2014.
They say the asteroid, which was discovered on 24 August, has a very low rating on the Torino Scale - which assesses the danger posed by asteroids.
It's currently rated one on the ten-point scale, which means "impact is extremely unlikely".
Once scientists have studied the asteroid a bit more, it's thought its rating will drop to "zero".
The asteroid is said to be 0.7 miles wide - only one tenth of the size of the giant rock thought to have wiped out the dinosaurs 65 million years ago.