Measuring between 150 and 190 feet (46 and 58 meters) in diameter, the asteroid is about the size of a Ferris wheel. During orbit, it comes within 9 million miles (14.5 million kilometers) of Earth.

What they saw was a space rock that measured between 150 and 190 feet across, or about the size of a Ferris wheel, which is actually a fairly small asteroid compared to some, reported CNN on Thursday.

It's about the size of a Ferris wheel; astronomers estimate it is 150 to 190 feet in diameter and gets as close as roughly 9 million miles from Earth.

Measuring between 150 and 190 feet (46 and 58 meters) in diameter, the asteroid is about the size of a Ferris wheel. During orbit, it comes within 9 million miles (14.5 million kilometers) of Earth.

Measuring between 150 and 190 feet in diameter, the asteroid is about the size of a Ferris wheel. During orbit, it comes within 9 million miles of Earth.

Measuring between 150 and 190 feet in diameter, the asteroid is about the size of a Ferris wheel. During orbit, it comes within 9 million miles of Earth. This sounds like a large asteroid, but it's ...