Kligat writes: Radio astronomers have discovered that the asteroid 2001 SN63 is actually a trio, with the main body being 2 km in diameter. The two fragments orbiting it are 1km and 400m in diameter. When sunlight hits a near-Earth asteroid that isn't a perfect sphere, it increases its spin, and if it rotates too fast, it breaks apart and sometimes forms natural satellites that orbit the main body.
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