# Tethys, Moon of Saturn

**Tethys** is a Moon that orbits round the planet Saturn. Its orbit circumference, the total distance it travels round its planetary parent is 1,851,478.78 km. The furthest it gets from its orbital parent (apoasis) is 294,701 km. Its mass is estimated/calculated at being 617,551,805,221,061,000,000 kg. Its density has been calculated at being 0.973 g/cm3. Its volume is 634,264,255 km3. It was discovered in the year 1684 by G.D. Cassini. Its orbital period, i.e. the period it takes to complete an orbit round Saturn is 1.888 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 294,672 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 617,551,805,221,061,000,000 kg. The equatorial circumference of Tethys is 3,348.9 km. The mean radius of Tethys is 533.0 km. The surface area of Tethys is 3,569,967.66 km2. The surface gravity of the said item is 0.145 m/s2. The average orbit velocity, that is the speed at which it orbits is 40,860.7 km/h.

The orbital inclination, the angle at which Tethys orbits in relation to the orbital plane is 1.091 degrees. The orbital eccentricity is 0.0001, it is the degree at which Tethys orbits close to a circular (0) orbit as opposed to an elliptical (1) orbit.

## Image of the Saturn moon of Tethys

## Tethys Facts

Type | Moon |

Orbital Circumference | 1,851,478.78 km |

Furthest from parent (Apoasis) | 294,701 km |

Mass | 617,551,805,221,061,000,000 kg |

Density | 0.973 g/cm3 |

Volume | 634,264,255 km3 |

Year of Discovery | 1684 |

Discoverer | G.D. Cassini |

Orbital Period | 1.888 |

Semi-Major Axis | 294,672 km |

Mass | 617,551,805,221,061,000,000 kg |

Equatorial Circumference | 3,348.9 km |

Mean Radius | 533.0 km |

Surface Area | 3,569,967.66 km2 |

Surface Gravity | 0.145 m/s2 |

Average Orbit Velocity | 40,860.7 km/h |

Orbital Inclination | 1.091 |

Orbital Eccentricity | 0.0001 |

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