Rahul Rao is a graduate of New York University's SHERP and a freelance science writer, regularly covering physics, space, and infrastructure. His work has appeared in Gizmodo, Popular Science, Inverse, IEEE Spectrum, and Continuum. He enjoys riding trains for fun, and he has seen every surviving episode of Doctor Who.
passed by the near-Earth asteroid Dinkinesh last November, it discovered that Dinkinesh had a companion — a little moonlet that astronomers soon named Selam. And now, scientists have measured Selam's age.
The crew simulated 1 million scenarios that resulted in a Selam-like body forming. The median scenario dated Selam as 3 million years old, while the most common result was closer to 2 million. If either of these figures are correct, Selam may actually be younger thanThis same method could help date other asteroid binary systems going forward. Dinkinesh is among the estimated 15 percent of near-Earth asteroids that have binary partners.
As for Lucy itself, it has only begun its epic tour of the solar system. The next asteroid on its itinerary, located between, is 52246 Donaldjohanson, which Lucy will visit in 2025.
Rahul Rao is a graduate of New York University's SHERP and a freelance science writer, regularly covering physics, space, and infrastructure. His work has appeared in Gizmodo, Popular Science, Inverse, IEEE Spectrum, and Continuum. He enjoys riding trains for fun, and he has seen every surviving episode of Doctor Who.
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