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Asteroid Donaldjohanson Wobbles as It Rotates, Lucy Flyby Reveals

Scientists said the asteroid’s two-lobed shape and clay minerals point to a violent collision and only brief exposure to liquid water.

Summary by Phys.org
Southwest Research Institute (SwRI) scientists studying the inner main-belt asteroid Donaldjohanson have found that its rotation wobbles. Rather than rolling through space in a steady pattern, Donaldjohanson turns on two axes, rotating end over end once every 10.5 Earth days while wobbling around its horizontal axis every 26.5 days. The findings are published in the journal Science.
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Gizmodo broke the news in New York, United States on Thursday, June 18, 2026.
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