# Psamathe, Moon of Neptune

**Psamathe** is a Moon that orbits round the planet Neptune. Its orbit circumference, the total distance it travels round its planetary parent is 290,917,287.50 km. The furthest it gets from its orbital parent (apoasis) is 66,415,766 km. Its mass is estimated/calculated at being 14,986,684,330,971,900 kg. Its density has been calculated at being 1.5 g/cm3. Its volume is 33,510 km3.

Psamathe was discovered on 29 August 2003 by Scott S. Sheppard, David C. Jewitt and Jan T. Kleyna. Its orbital period, i.e. the period it takes to complete an orbit round Neptune is 9128.74 days. The figure is also known as the sidereel period. The figure comes from N.A.S.A..

The Semi-Major Axis of the orbit is 48,096,000 km, which is the furthest point from the centre to the edge of an elliptical point.

The mass of the object is calculated at being 14,986,684,330,971,900 kg. The equatorial circumference of Psamathe is 125.7 km. The mean radius of Psamathe is 20.0 (assuming an albedo of 0.04) km. The surface area of Psamathe is 5,026.55 km2. The surface gravity of the said item is 0.003 m/s2. The average orbit velocity, that is the speed at which it orbits is 1,335.8 km/h.

The orbital inclination, the angle at which Psamathe orbits in relation to the orbital plane is 126.312 degrees. The orbital eccentricity is 0.3809, it is the degree at which Psamathe orbits close to a circular (0) orbit as opposed to an elliptical (1) orbit.

## Psamathe Facts

Type | Moon |

Orbital Circumference | 290,917,287.50 km |

Furthest from parent (Apoasis) | 66,415,766 km |

Mass | 14,986,684,330,971,900 kg |

Density | 1.5 g/cm3 |

Volume | 33,510 km3 |

Date of Discovery | 29 August 2003 |

Discoverer | Scott S. Sheppard, David C. Jewitt and Jan T. Kleyna |

Orbital Period | 9128.74 |

Semi-Major Axis | 48,096,000 km |

Mass | 14,986,684,330,971,900 kg |

Equatorial Circumference | 125.7 km |

Mean Radius | 20.0 (assuming an albedo of 0.04) km |

Surface Area | 5,026.55 km2 |

Surface Gravity | 0.003 m/s2 |

Average Orbit Velocity | 1,335.8 km/h |

Orbital Inclination | 126.312 |

Orbital Eccentricity | 0.3809 |

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