NASA has discovered an asteroid that is involved in a friendly “little dance with Earth.”
According to NASA scientists Earth has a cosmic companion other than the moon following the planet’s annual orbit around the sun.
The newly discovered near-Earth object is considered a “quasi-satellite” because it never ventures too far away from Earth.
“This new asteroid is much more locked onto us,” Chodas added. “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.”
Indeed, 2016 HO3 is the best example of an Earth quasi-satellite ever found, scientists said.
The asteroid was discovered on April 27 by scientists using the Pan-STARRS 1 survey telescope in Hawaii. 2016 HO3’s exact size is unknown, but researchers think it’s between 130 feet and 330 feet wide (40 to 100 meters).
As the space rock circles the sun, it loops around Earth as well, zooming ahead of the planet half of the time and trailing behind the other half, NASA officials said. 2016 HO3’s orbit is tilted slightly relative to that of Earth, so the asteroid also bobs up and down through our planet’s orbital plane.
The path of 2016 HO3 tends to twist and drift over time, but Earth’s gravitational pull keeps the asteroid contained: It never comes closer than 9 million miles (14.5 million kilometers) to our planet, and it never gets more than 24 million miles (38.6 million km) away, researchers said.
“In effect, this small asteroid is caught in a little dance with Earth,” Chodas said.
This dance is not dangerous: 2016 HO3 poses no threat to the planet, NASA officials said.
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