Planet Neptune

Some Facts about The Neptunian Moon, Psamathe
courtesy of NASA

Discovered ByS. S. Sheppard, D. C. Jewitt, J. Kleyna
Date of Discovery2003
Average Distance from Neptune46,695,000 km (metric)
Equatorial Radius14 km (metric)
Mass20,000,000,000,000,000 kg (metric)
Orbit Period (Length of Year)-9136.1 (retrograde) Earth days
Orbital Eccentricity0.45
Orbital Inclination to Ecliptic137.3°
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