Tiny Asteroid Zips Close By Earth

The newly discovered object, officially designated 2011 CQ1, is shown in this image from Tzec Maun Observatory in New Mexico.
The newly discovered object, officially designated 2011 CQ1, is shown in this image from Tzec Maun Observatory in New Mexico. (Image credit: G. Sostero & E. Guido/Remanzacco Observatory)

A tiny asteroid passed close by Earth Friday (Feb. 4) but posed no threat of impacting our planet – or even reaching the surface, NASA officials say.

The small asteroid, called 2011 CQ 1, passed within 3,400 miles (5471 km) of Earth at about 2:40 p.m. EST (1940 GMT). The close pass occurred just hours after the asteroid was discovered by astronomer Richard A. Kowalski, according to scientists at Remanzacco Observatory in Italy, who snapped a photo of the asteroid taken soon after it was spotted.

Asteroid 2011 CQ 1 is only 4 feet (1.3 meters) wide, so small that it would have incinerated in Earth's atmosphere before reaching the ground, according to officials with NASA's Asteroid Watch program. The asteroid never threatened to hit Earth, they said.

"Even if it came closer, a rocky asteroid small as 2010 CQ1 would break apart in our atmosphere and cause no ground damage," NASA Asteroid Watch scientists wrote in a Twitter post.

NASA and other astronomers routinely scan the skies to search for asteroids or comets that may be an impact threat to Earth. The Near-Earth Object Observations program at NASA's Jet Propulsion Laboratory in Pasadena, Calif., tracks potentially dangerous asteroids and studies their orbits to determine if they pose a risk of hitting the Earth.

Asteroid 2011 CQ 1, however, is not dangerous or big. It's one of the many asteroids thought to zip close by Earth unnoticed every day, NASA officials said.

"It's predicted that tiny space rocks pass between Earth and moon almost daily but are too small to be detected and pose very little threat," Asteroid Watch scientists wrote.

That doesn't mean skywatchers aren't interested in the tiny space rock.

Astronomers Ernesto Guido and Giovanni Sostero at the Remanzacco Observatory are keeping a close eye on Asteroid 2011 CQ 1. After releasing the initial photo, they also added that skywatcher, Andrew Lowe, deduced the asteroid would cross across the face of the sun – which astronomers call a "transit" – shortly after its close pass by Earth.

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Tariq Malik

Tariq is the Editor-in-Chief of Space.com and joined the team in 2001, first as an intern and staff writer, and later as an editor. He covers human spaceflight, exploration and space science, as well as skywatching and entertainment. He became Space.com's Managing Editor in 2009 and Editor-in-Chief in 2019. Before joining Space.com, Tariq was a staff reporter for The Los Angeles Times covering education and city beats in La Habra, Fullerton and Huntington Beach. In October 2022, Tariq received the Harry Kolcum Award for excellence in space reporting from the National Space Club Florida Committee. He is also an Eagle Scout (yes, he has the Space Exploration merit badge) and went to Space Camp four times as a kid and a fifth time as an adult. He has journalism degrees from the University of Southern California and New York University. You can find Tariq at Space.com and as the co-host to the This Week In Space podcast with space historian Rod Pyle on the TWiT network. To see his latest project, you can follow Tariq on Twitter @tariqjmalik.