Using a dumbbell model, the paper predicts that Apophis's spin state could deviate by a few degrees within days of the 2029 closest approach if its Young's modulus is about 10 kPa or lower.
, author Oberbeck , V.R
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Prediction of Apophis's deformation-driven rotational evolution during its closest encounter to the Earth in 2029
Using a dumbbell model, the paper predicts that Apophis's spin state could deviate by a few degrees within days of the 2029 closest approach if its Young's modulus is about 10 kPa or lower.