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To their surprise, they found that 2001 SN263 isn’t one rock, but three — the first triple system discovered among near-Earth asteroids. The largest chunk has a diameter of about 2 kilometers while two smaller fragments that orbit the main body are 1 km and 400 meters in diameter, Nolan reported July 17 at the Asteroids, Comets, Meteors meeting in Baltimore.
When sunlight strikes a near-Earth object that isn’t perfectly spherical, the uneven heating of the surface causes the body to spin up. If the object spins too fast, it breaks apart and can sometimes form stable satellites that orbit the main body.
it looks like a planet with two moons.
Nairobi anyone?