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Using speed measurements of the gas at different distances from the Galactic center, the Sun appears to be cruising along at 200 kilometers per second and it takes 240 million years to complete the grand circuit around the Galaxy. This speed is an absolute speed.
How fast an asteroid travels depends on its distance from the sun.  The average orbital speed is 25 kilometers per second. The closest  orbiting asteroid to the sun travels â¦at 30 kilometers per second. 2 people found this useful.