2023 DZ2: Potentially dangerous asteroid ‘size of a building’ will pass very close to Earth in coming days

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The huge space rock will get closer to Earth than the moon this weekend, with astronomers tracking its risk of hitting our planet  - here’s what you need to know.

A building-sized asteroid is set to fly closer to Earth than the moon this weekend. Astronomers first spotted the huge space rock on February 27 - and have been tracking its potential risk of impacting Earth.

Dubbed 2023 DZ2, the asteroid is roughly 40–95 metres (130–310 feet) in diameter, and is classified as a near-Earth object of the Apollo group of asteroids. And were it to crash into Earth, it would cause catastrophic damage.

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In fact, if the worst had happened, it is estimated that an impact would produce an upper atmosphere air burst equivalent to 4.5 Mt TNT - roughly equal to 214 times the Fat Man warhead dropped on Nagasaki.

Luckily, according to NASA Jet Propulsion Laboratory data, the asteroid is thought to pose no risk to our planet. The asteroid will remain about 107,500 miles from Earth, according to the Virtual Telescope Project.

Given the asteroid’s orbit right now, there is a 1 in 430 chance it will impact Earth on March 27, 2026. But according to EarthSky, that slight chance is likely to vanish as astronomers learn more about the space rock’s trajectory.

A building-sized asteroid will fly closer to Earth than the moon on Saturday. Astronomers first spotted the space rock on 27 February and have been tracking its potential risk of impacting Earth. A building-sized asteroid will fly closer to Earth than the moon on Saturday. Astronomers first spotted the space rock on 27 February and have been tracking its potential risk of impacting Earth.
A building-sized asteroid will fly closer to Earth than the moon on Saturday. Astronomers first spotted the space rock on 27 February and have been tracking its potential risk of impacting Earth. | NASA/SWNS

How to see the 2023 DZ2 asteroid from Earth

Most asteroids aren’t bright enough to be seen by the naked eye. But skywatchers with six inch (15cm) telescopes or larger have an opportunity to see 2023 DZ2 from the Northern Hemisphere on Saturday evening.

The Virtual Telescope Project will also show a live-stream of the asteroid on Saturday (March 25) at 11.30pm UTC.

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