Distance from the sun: 4,495×9 km
Surface area: 7,6408×109 km²
Radius: 24 630 km
Surface gravity: 11,15 m/s2
Sidereal rotation period: 15h 57m 59s
Mass: 1,0243×1026 kg
Satellites: 14 Naiad, Thalassa, Despina, Galatea, Larissa, S/2004 N 1, Proteus, Triton, Nereid, Halimede, Sao, Laomedeia, Psamathe, Neso.
