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Asteroid 1620 Geographos
One of the most elongated asteroids known, mapped by radar.
The actual model file, as it will be printed. Drag to turn it.
Geographos is about five kilometres long and less than two wide, which makes it one of the most stretched objects ever measured. The shape comes from Goldstone radar observations made when it passed close to Earth in 1994.
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.