Mercury
Mercury. Basic Properties of Mercury. Average Distance from Sun: 58,000,000 km (0.39 AU). But: Orbital eccentricity = 0.206. Therefore distance varies from 46,000,000 to 70,000,000 km. Orbital period: 88 days. Period of Spin around axis: 58.65 days Mass = 3.3x1023 kg = 0.055 M
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