Eeek! If someone attempted to spin Ceres up to 0.3g of spin “gravity” at its equator, it will have disintegrated early in the process. Spin “gravity” pulls outwards, not inwards. Its own gravity is only 0.029g, just under a tenth of the claimed spin gravity. There’s no way it has the structural strength to withstand this treatment, since it’s made of rock and ice, with a density of under 2.2, and has collapsed into a spherical shape under its own gravity
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