For Star subscribers: University of Arizona researchers watched closely last week as a potentially dangerous asteroid whizzed past Earth. Here's what they learned.
Henry Brean An asteroid large enough to destroy a city whizzed harmlessly past Earth last week, and an international team led by researchers at the University of Arizona used the close call to practice for when our planet's luck eventually runs out.
"That’s super close,” said Reddy, who also helps the U.S. Air Force keep track of satellites and space junk.Asteroid 2023 DZ2 was first spotted on Feb. 27. Early orbital calculations showed a good chance of a collision with Earth three years from now, but subsequent observations have all but ruled that out for the foreseeable future. According to UA astronomers, the probability of an impact in 2026 has dropped from about 1 in 430 just two weeks ago to about 1 in 71,000.
The space rock is roughly 100 feet in diameter, making it almost as big as the one that created Meteor Crater west of Winslow roughly 50,000 years ago. The good news, according to Reddy: Astronomers should be able to calculate the approximate point of impact from an inbound threat fairly soon after it is discovered, giving people sufficient time to escape the blast zone and prepare for what might come next.
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