Sponsored by the Institute of Physics   Planets   Mercury   Venus   Earth   Mars   Jupiter   Saturn   Uranus   Neptune     Rings     Naiad     Thalassa     Despina     Galatea     Larissa     Proteus     Triton     Nereid   Pluto Asteroids Comets Constellations Sunrise and Sunset Times Moon Phases SI Units Symbols   Printer Version Astronomy Planets - Neptune - Triton Bulk Parameters Orbital Parameters Bulk Parameters Mass 214.7 × 1020 kg Radius 1 352.6 km Mean Density 2 054 kg m-3 Visual Geometric Albedo 0.7 Orbital Parameters Semimajor Axis 354.76 × 103 km Period 5.876854 days (Retrograde) Orbital Inclination 156.834 ° Orbital Eccentricity   [ H O M E ] [ S C I E N C E ] [ M A T H S ] [ A S T R O N O M Y ] Download | Shop | Contact | About   Page compiled: Wed Sep 05 18:38:01 GMT+01:00 2001