Study of Self-Locking Structure Based on Surface Microstructure of Dung Beetle Leg Joint. [PDF]
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The rotation of asteroid (16) Psyche
Chinese Astronomy and Astrophysics, 1982Abstract We used observations at 4 oppositions to calculate the rotation of the asteroid (16) Psyche. Our results are 1) the pole is λ 225°, β = +5° (1950.0), 2) the rotation is direct, and 3) the sidereal period is 4h 11m 45s.42 ± 0s.01. At the three oppositions of 1955, 1965 and 1980, the relative positions of the Sun, the Earth and the asteroids ...
null Zhou Xing-hai, null Yang Xiu-yi
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Origin of asteroid rotation rates in catastrophic impacts
Nature, 1997The rotation rates of asteroids, which are deduced from periodic fluctuations in their brightnesses, are controlled by mutual collisions. The link between asteroid spin and collision history is usually made with reference to impact experiments on centimetre-scale targets, where material strength governs the impact response.
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