NASA have discovered a small asteroid circling the earth, which they say has been around for 50 years.
The asteroid, called 2016 HO3, will remain circling the earth for the next few hundred years, according to scientists.
“Our calculations indicate 2016 HO3 has been a stable quasi-satellite of Earth for almost a century, and it will continue to follow this pattern as Earth’s companion for centuries to come,” said Paul Chodas, manager of NASA’s Center for Near-Earth Object Studies.
— Asteroid Watch (@AsteroidWatch) June 15, 2016
Scientists think the asteroid is between 120 and 300 feet (37 to 91 meters) in diameter. It was found on April 27, 2016 by the Pan-STARRS 1 asteroid survey telescope in Haleakala, Hawaii.
The asteroid is not going to hit us — NASA says it never gets closer than 9 million miles (14 million kilometers) from Earth.
So does this mean Earth has another moon? NASA says that because the asteroid is so far away it can’t be considered a natural moon, or satellite. Instead, they’re calling it a “quasi-satellite.”
“Since 2016 HO3 loops around our planet, but never ventures very far away as we both go around the sun, we refer to it as a quasi-satellite of Earth,” said Chodas in an online press release.
Our moon, by the way, is about 239,000 miles (384,000 kilometers) from Earth. Its diameter is about 2,000 miles (3,219 kilometers).
This isn’t the first time Earth has picked up an asteroid companion.
“One other asteroid — 2003 YN107 — followed a similar orbital pattern for a while over 10 years ago, but it has since departed our vicinity. This new asteroid is much more locked onto us,” Chodas said.
And some scientists think there could be other “mini-moons” orbiting the Earth — some permanent and some temporary.
In 2012, researchers using a super computer concluded “that at any given time there should be at least one asteroid with a diameter of at least one meter orbiting Earth.”
And there could be many smaller objects orbiting Earth as well.
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