CAPE CANAVERAL, Fla. — 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 percent chance the space rock 2024 YR4 will smack Earth in 2032. This also means there’s a 98 percent 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.
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 — like this one.
A telescope in Chile discovered the asteroid 2024 YR4 in December. It’s estimated to be 130 to 300 feet across. Observations by the Webb telescope should provide a more precise measurement, according to NASA.
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Should we worry about asteroid 2024 YR4?
NASA and the European Space Agency initially put the odds of a strike at just over 1 percent. By Thursday, it had risen to roughly 2 percent. NASA describes that as still “extremely low.”
Until scientists have a better understanding of the asteroid’s path around the sun, they caution that the odds will continue to fluctuate — and possibly fall to zero.
“You don’t have to be worried about anything. It’s a curiosity,” said Larry Denneau, senior software engineer with the University of Hawaii’s asteroid impact alert system that first spotted the asteroid. “Don’t panic. Let the process play out.”
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.
If 2024 YR4 is on the smaller end, the European Space Agency said, any potential impacts would be local, similar to the Tunguska event that flattened thousands of square miles of forest in remote Siberia in 1908. But if it’s close to 330 feet, “the consequences would be significantly worse.”
NASA’s Dart spacecraft deliberately rammed a harmless asteroid in 2022 in the first planetary defense test of its kind, altering its orbit around its larger companion asteroid.
