Which planet is 5.5 percent of earth's mass and has no moon?

Mercury has 0.0553 earth's mass and has no natural satellite. It is the planet closest to the sun and also the smallest, its surface is rocky and solid like the earth, has a diameter of 4879 km and is formed mainly of metal elements. Its orbit around the sun is 88 days and its temperatures are extremely high due to its proximity to the sun.

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