Psamathe is a natural satellite of Neptune in the NASA/JPL Solar System Dynamics planetary satellite tables.
- Planet: Neptune
- Satellite: Psamathe
- Satellite code: 810
- Physical parameters: not listed in the NASA/JPL planetary satellite physical parameters table
- Ephemeris: NEP104
- Reference frame: ecliptic
- Epoch (TDB): 2020-01-01.0
- Semi-major axis a: 47646600. km
- Eccentricity e: 0.413
- Argument of periapsis ω: 148.2 deg
- Mean anomaly M: 183.2 deg
- Inclination i: 127.8 deg
- Longitude of ascending node: 302.9 deg
- Sidereal period P: 9149. days
- Argument of periapsis precession period: 1484. yr
- Longitude of ascending node precession period: 1333. yr
- Mean elements reference: 43