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| | Meaning | God of Death | | Position | 9 | | Discoverer | Clyde Tombaugh | | Discovered | 1930 | | Length of Day ( hrs ) | 153.282 | | Distance from Sun ( 10^6Km ) | 5870 | | Volume (10^10 km3) | 0.715 | | Equatorial Radius | 1195 | | Volumetric Mean Radius | 1195 | | Ellipticity | 0 | | Mean Density | 1750 | | Surface Gravity | 0.58 | | Surface Acceleration | 0.58 | | Escape Velocity | 1.1 | | Orbit Period | 4.72 | | Orbit Eccentricity | 0.2444 | | Average Temperature | -50K/-223C | | Surface Pressure | -3 microbars | | Average Temperature | -50K/-223C | | Atmosphere | Methane (CH4), Nitrogen (N2)
| | Moon Count | 1 | | Moons | Charon
| | Picture Copyright | N.A.S.A. |
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