# Despina, Moon of Neptune

**Despina** is a Moon that orbits round the planet Neptune. The furthest it gets from its orbital parent (apoasis) is 52,537 km. Its mass is estimated/calculated at being 2,098,135,806,336,070,000 kg. Its density has been calculated at being 1.3 g/cm3. Its volume is 1,767,146 km3. It was discovered in the year 1989 by S. Synnott, Voyager 2. Its orbital period, i.e. the period it takes to complete an orbit round Neptune is 0.335 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 52,526 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 2,098,135,806,336,070,000 kg. The equatorial circumference of Despina is 471.2 km. The mean radius of Despina is 75.0 km. The surface area of Despina is 70,685.83 km2. The surface gravity of the said item is 0.025 m/s2. The average orbit velocity, that is the speed at which it orbits is 41,048.6 km/h.

The orbital inclination, the angle at which Despina orbits in relation to the orbital plane is 0.07 degrees. The orbital eccentricity is 0.000, it is the degree at which Despina orbits close to a circular (0) orbit as opposed to an elliptical (1) orbit.

## Despina Facts

Type | Moon |

Furthest from parent (Apoasis) | 52,537 km |

Mass | 2,098,135,806,336,070,000 kg |

Density | 1.3 g/cm3 |

Volume | 1,767,146 km3 |

Year of Discovery | 1989 |

Discoverer | S. Synnott, Voyager 2 |

Orbital Period | 0.335 |

Semi-Major Axis | 52,526 km |

Mass | 2,098,135,806,336,070,000 kg |

Equatorial Circumference | 471.2 km |

Mean Radius | 75.0 km |

Surface Area | 70,685.83 km2 |

Surface Gravity | 0.025 m/s2 |

Average Orbit Velocity | 41,048.6 km/h |

Orbital Inclination | 0.07 |

Orbital Eccentricity | 0.000 |

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