Triton

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Triton
Triton is the largest natural satellite of the planet Neptune. It is the only large moon in the Solar System with a retrograde orbit, an orbit in the opposite direction to its planet's rotation. Because of its retrograde orbit and composition similar to Pluto's, Triton is thought to have been a dwarf planet captured from the Kuiper belt. Triton has a surface of mostly frozen nitrogen, a mostly water-ice crust, an icy mantle and a substantial core of rock and metal. The core makes up two-thirds of its total mass. Triton is one of the few moons in the Solar System known to be geologically active. As a consequence, its surface is relatively young with sparse impact craters, with a complex geological history revealed in intricate cryovolcanic and tectonic terrains. Triton (moon) - Wikipedia, the free encyclopedia
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Short Description Triton is the largest natural satellite of the planet Neptune. It is the only large moon in the Solar System with a retrograde orbit, an orbit in the opposite direction to its planet's rotation. Because of its retrograde orbit and composition similar to Pluto's, Triton is thought to have been a dwarf planet captured from the Kuiper belt. Triton has a surface of mostly frozen nitrogen, a mostly water-ice crust, an icy mantle and a substantial core of rock and metal. The core makes up two-thirds of its total mass. Triton is one of the few moons in the Solar System known to be geologically active. As a consequence, its surface is relatively young with sparse impact craters, with a complex geological history revealed in intricate cryovolcanic and tectonic terrains. Triton (moon) - Wikipedia, the free encyclopedia
Discovered by William Lassell
Discovery date October 10, 1846
Type Moon
AddInfo Neptune I
Satellite of Neptune
Orbit Retrograde
Rotation Synchronous
Atmosphere Trace
Shape Equilibrium spheroid
Geological activity Is active
Apoapsis 06 354 765 km
Periapsis 06 354 753 km
Semi-major axis 06 354 759 km
Distance from Sun 02 30.110 387 au /07
Eccentricity 0.000 016
Orbital period 5.876 854 days
Orbital speed 01 4.39 km/s
Inclination to the ecliptic 129.812°
Inclination to the equator 156.885°
Diameter/Size 04 2 706.8 ± 1.8 km
Mass 1022×2.14 kg
Density 01 2.061 g/cm3
Surface gravity  0.779 m/s2 | 0.0794 g | 0.48 Moons
Escape velocity 04 1 455 m/s
Rotation period 5.876 854 days
Axial tilt
Albedo geometric 0.76
Temperature mean 02 38 K | −235.2 °C
Apparent magnitude 13.47
Absolute magnitude −1.2
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