Pluto is the farthest known Planet of  our solar system. It’s diameter is not  jet known exactly it might be about 2200 km. Its mass  is estimated on 1022 kg or 0,0026  earth masses, it’s density is probably around 2 g/cm3. The distance of the planet to the sun varies between 4’425*10^6 and 7’375*10^6 km. The average distance is about 5’966*10^6 km. Sometimes it comes closer to the Sun than Neptune. The eccentricity of the orbit is with 0.25 very large, as well as the orbit angle against the ecliptic with 17° 9’. A revolution of the Pluto lasts 6.39 earth days, the revolution time around the sun 247.7 earth days. Pluto has a moon named Charon, witch has been investigated only a little up to now.