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I assume you mean "asteroid". The speed of an asteroid is comparable to that of a planet. For example, an asteroid with an orbit similar to Earth's orbit would have a speed similar to Earth, which moves around the Sun at a rate of 30 km/second. An asteroid that is much further out will be slower; one that gets closer to the Sun will move faster, at least during part of its orbit.You can calculate the speed of an asteroid from Earth's speed, and the relative distances to the Sun, using Kepler's Third Law.

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9y ago

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