Pluto: Planet Profile

Mass (kg) 1.29 x 1022
Diameter (km) 2300
Mean density (kg/m3) 2030
Escape velocity (m/s) 1100
Average distance from Sun 39.48 AU (5,906,376,200 km)
Rotation period (length of day in Earth days) 6.39 (retrograde)
Revolution period (length of year in Earth years)     247.92
Obliquity (tilt of axis degrees) 122.5
Orbit inclination (degrees) 17.15
Orbit eccentricity (deviation from circular) 0.248
Mean temperature (K) 37
Visual geometric albedo (reflectivity) about 0.5
Atmospheric components perhaps methane and nitrogen
Surface materials perhaps methane ice