Why asteroid 2024 YR4 is unlikely to hit Earth in 2032 and how scientists keep track – Winnipeg Free Press

CAPE CANAVERAL, Fla. (AP) — The threat of a newly discovered asteroid has risen slightly in the past few weeks, as the world’s telescopes rush to track its course. But the chance of an impact is still quite slim.

New calculations suggest there’s a 2% chance the space rock 2024 YR4 will smack Earth in 2032. This also means there’s a 98% chance it will safely pass our planet. The odds of a strike will almost certainly continue to go up and down as the asteroid’s path around the sun is better understood, and astronomers said there’s a good chance the risk likely will drop to zero.

NASA and the European Space Agency’s Webb Space Telescope will observe this near-Earth asteroid in March before the object disappears from view. Once that happens, scientists will have to wait until 2028 when it passes our way again.

FILE – This May 18, 1969 photo provided by NASA shows Earth from 36,000 nautical miles away as photographed from the Apollo 10 spacecraft during its trans-lunar journey toward the moon. (NASA via AP)

WHAT’S AN ASTEROID?

Asteroids are space rocks orbiting the sun that are considerably smaller than planets. Scientists believe they’re the leftovers from the solar system’s formation 4.6 billion years ago.

There are so many asteroids orbiting between Mars and Jupiter — millions of them — that this region is known as the main asteroid belt. They sometimes get pushed out of the belt and can end up all over the place.

HOW DO SCIENTISTS TRACK POTENTIALLY DANGEROUS ASTEROIDS?

A telescope in Chile discovered the asteroid 2024 YR4 in December. It’s estimated to be 130 feet to 300 feet (40 meters to 90 meters) across. Observations by the Webb telescope should provide a more precise measurement, according to NASA.

NASA and the European Space Agency initially put the odds of a strike at just over 1%. By Thursday, it had risen to roughly 2%. NASA describes that as still “extremely low.”

Until scientists have a better understanding of the asteroid’s path around the sun, they caution the odds will continue to fluctuate — and quite possibly fall to zero.

In 2021, NASA gave the all-clear to another potentially worrisome asteroid, Apophis, after new telescope observations ruled out any chance of it hitting Earth in 2068.

SHOULD WE WORRY ABOUT ASTEROID 2024 YR4?

It’s way too soon to fret over this asteroid, according to the experts.

“No one should be concerned that the impact probability is rising. This is the behavior our team expected,” Paul Chodas, director of NASA’s Center for Near-Earth Object Studies, said in an email. “To be clear, we expect the impact probability to drop to zero at some point.”

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