Mercury’s (The Planet of Fire and Ice) rotation period or the time it takes to circle around on it’s axis is 58.65 Earth days. The orbit around the sun or the length of the year is 87.97 Earth days. Mercury is 28.5 million miles from the sun. Mercury’s mass is only 0.055 of Earth’s. The temperature on Mercury is from -292 to + 806. Leaving it impossible to live their. The gravity at the equator is 0.28 of Earth’s. Since Mercury’s gravity is different than Earth’s you would weigh different. If you weighed 150lb you would weigh 55lb. The diameter of Mercury is 3,030 miles.