Triton

Albedo 0.76

Apoapsis 354,766 km (0.00237 AU, 220,441.372 mi)

Axial tilt 0 rad (0 °, 0 grad)

Color #FF9999

Composition 25% [[water]] ice, 75% rock

Date of discovery 10 October 1846

Escape speed 1.453 km/s (5,229.36 km/h, 0.903 mi/s, 3,249.374 mph)

Inclination 2.746 rad (157.345 °, 174.828 grad)

Lunar mass 2.14e+22 kg (0.291 M☾, 0.00358 M⊕)

Lunar surface area 23,017,715 km² (8,887,189.446 mi², 0.607 A☾, 0.0451 A⊕)

Mean radius 1,353.4 km (840.964 mi)

Mean temperature 34.5 K (-238.65 °C, -397.57 °F, 62.1 °R)

Orbital eccentricity 1.6e-5

Order 7

Periapsis 354,754 km (0.00237 AU, 220,433.916 mi)

Planet density 2,050 kg/m³ (2.05 g/ml, 127.977 lb/ft³)

Semi-major axis 354,760 km (0.00237 AU, 220,437.644 mi)

Sidereal day -141.044 h (-5.877 da)

Sidereal period -5.877 da (-0.0161 a)

Surface gravity 0.78 m/s² (2.558 ft/s², 0.0795 g)

Discoverer William Lassell +

Member of Moon +

Primary Neptune +

Categories Astronomy +, Moon +, Solar system +