External Content

The following content is sourced from external partners. We cannot guarantee that it is suitable for the visually or hearing impaired.

FILE PHOTO: This color image of Earth, taken by NASA's Earth Polychromatic Imaging Camera (EPIC), a four megapixel CCD camera and telescope on July 6, 2015, and released on July 20, 2015. REUTERS/NASA/Handout via Reuters/File Photo

(reuters_tickers)

FRANKFURT (Reuters) - An asteroid the size of a school bus flew remarkably near Earth on Thursday, providing scientists with an opportunity to test the warning systems that would kick in if a space collision was coming.

Asteroid 2012 TC4 came close -- passing Earth at a distance of only around 44,000 km (27,000 miles), which is nothing in Universe terms.

There was no actual risk of a hit, although the asteroid did come well inside the orbit of the Moon and that of some human-made satellites.

"Basically, we pretended that this is a 'critical' object with a high risk of impacting Earth ... and exercised our communication channels and used telescopes and radar systems for observations," Detlef Koschny of European Space Agency said in a blog post on the agency's website.

The results were mixed.

Koschny said one big radar system in Puerto Rico did not work due to damage from Hurricane Maria but that another U.S. based radar system was used instead.

"This is exactly why we do this exercise – to not be surprised by these things," he said.

Radar images showed the asteroid was about 10 to 12 metres (yards) wide, roughly the size of an asteroid that exploded over Chelyabinsk, Russia in 2013, leaving more than 1,000 people injured by flying glass and debris.

Koschny said the ESA now needed to update its predictions for how close 2012 TC4 will come to Earth on its next flyby, which has so far been forecast for 2079.

(Reporting by Maria Sheahan; Editing by Jeremy Gaunt)

Neuer Inhalt

Horizontal Line


subscription form

Form for signing up for free newsletter.

Sign up for our free newsletters and get the top stories delivered to your inbox.







Click here to see more newsletters

swissinfo EN

The following content is sourced from external partners. We cannot guarantee that it is suitable for the visually or hearing impaired.

Join us on Facebook!

Reuters