# Portia, Moon of Uranus

**Portia** is a Moon that orbits round the planet Uranus. Its orbit circumference, the total distance it travels round its planetary parent is 415,318.55 km. The furthest it gets from its orbital parent (apoasis) is 66,107 km. Its mass is estimated/calculated at being 1,681,505,981,935,050,000 kg. Its density has been calculated at being 1.3 g/cm3. Its volume is 1,293,983 km3. It was discovered in the year 1986 by S. Synnott, Voyager 2. Its orbital period, i.e. the period it takes to complete an orbit round Uranus is 0.513 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 66,100 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 1,681,505,981,935,050,000 kg. The equatorial circumference of Portia is 424.7 km. The mean radius of Portia is 67.6 km. The surface area of Portia is 57,425.30 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 33,732.8 km/h.

The orbital inclination, the angle at which Portia orbits in relation to the orbital plane is 0.059 degrees. The orbital eccentricity is 0.0001, it is the degree at which Portia orbits close to a circular (0) orbit as opposed to an elliptical (1) orbit.

## Portia Facts

Type | Moon |

Orbital Circumference | 415,318.55 km |

Furthest from parent (Apoasis) | 66,107 km |

Mass | 1,681,505,981,935,050,000 kg |

Density | 1.3 g/cm3 |

Volume | 1,293,983 km3 |

Year of Discovery | 1986 |

Discoverer | S. Synnott, Voyager 2 |

Orbital Period | 0.513 |

Semi-Major Axis | 66,100 km |

Mass | 1,681,505,981,935,050,000 kg |

Equatorial Circumference | 424.7 km |

Mean Radius | 67.6 km |

Surface Area | 57,425.30 km2 |

Surface Gravity | 0.025 m/s2 |

Average Orbit Velocity | 33,732.8 km/h |

Orbital Inclination | 0.059 |

Orbital Eccentricity | 0.0001 |

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