Mercury (planet)
Mercury is one of four terrestrial planets in the Solar System, and is a rocky body like Earth. It is the smallest planet in the Solar System, with an equatorial radius of . Mercury is also smaller—albeit more massive—than the largest natural satellites in the Solar System, Ganymede and Titan. Mercury consists of approximately 70% metallic and 30% silicate material. Mercury's density is the second highest in the Solar System at 5.427 g/cm, only slightly less than Earth's density of 5.515 g/cm. If the effect of gravitational compression were to be factored out from both planets, the materials of which Mercury is made would be denser than those of Earth, with an uncompressed density of 5.3 g/cm versus Earth's 4.4 g/cm.
(3708) 1974 FV1
As of 2018, it has not received a name. This makes "" the lowest-numbered unnamed minor planet (there are more than half a million numbered minor planets with more than 20,000 of them being named). This contrasts with the neighboring asteroid, 3707 Schröter and 3709 Polypoites, that were already named in September 1993 and April 1988, respectively (). The asteroid is the next low-numbered, unnamed minor planet.