Mass: 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.