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Asteroid 4179 Toutatis
A near-Earth asteroid that tumbles rather than spins.
The actual model file, as it will be printed. Drag to turn it.
Most asteroids rotate about a single axis. Toutatis does not — it tumbles, with two periods interacting, so it never presents the same face the same way twice. China's Chang'e 2 flew past it in 2012.
Published by NASA in their 3D Resources collection, which they state is free of copyright. Printed to order — scaled to about 80 mm on its longest side, and resizeable on the next page.