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It takes about 58.6 Earth days. Mercury spins 3 times on its axis for every two revolutions around the Sun. A sidereal day on Mercury is 58.6 Earth days, at a slow equatorial rotation speed of only 10.89 km/hr.

This results in a "solar day" (time between consecutive noontimes) of two Mercury years, or 176 Earth days.

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12y ago

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