Pluton

Planet Profile

Mass (kg)............................................1.29 x 10^22
Diameter (km)........................................2300
Mean density (kg/m^3) ...............................2030
Escape velocity (m/sec)..............................1100

Average distance from Sun (AU).......................39.53
Rotation period (length of day) (in Earth days)......6.39
Revolution period (length of year) (in Earth years)..247.7

Obliquity (tilt of axis) (degrees)...................122.5
Orbit inclination (degrees)..........................17.15
Orbit eccentricity...................................0.248

Mean temperature (K).................................37

Visual geometric albedo..............................about 0.5

Atmospheric components...............................perhaps 
                                                     methane and 
                                                     nitrogen 
Surface materials....................................perhaps 
						     methane ice

LES SATELLITES NATURELS

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