|Diameter|| 2,368 km|
|Distance from the Sun|| 5.9 billion km|
3.6 billion mi.
|Mass|| (1.305±0.007)×10^22 kg|
|Number of moons||more than 5|
|Length of day||6 days|
|Length of year||248 years|
|Atmosphere Components|| Nitrogen|
Pluto (134340) is the second-most-massive known dwarf planet in the Solar System (after Eris) and the tenth-most-massive body observed directly orbiting the Sun. Although Pluto was discovered in 1930, limited information on the distant object delayed a realistic understanding of its characteristics. Pluto is the second largest known dwarf planet and tenth largest orbiting the Sun. From its time of discovery in 1930 to 2006 it was considered to be the ninth planet in the solar system, but because additional objects have been discovered including Eris which is 27% more massive, the IAU reclassified Pluto and the other objects as dwarf planets.