# Larissa, Moon of Neptune

**Larissa** is a Moon that orbits round the planet Neptune. Its orbit circumference, the total distance it travels round its planetary parent is 462,115.49 km. The furthest it gets from its orbital parent (apoasis) is 73,651 km. Its mass is estimated/calculated at being 4,945,605,829,220,740,000 kg. Its density has been calculated at being 1.3 g/cm3. Its volume is 3,822,996 km3. It was discovered in the year 1982 by H. Reitsema, W. Hubbard, L. Lebofsky, D. Tholen. Its orbital period, i.e. the period it takes to complete an orbit round Neptune is 0.555 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 73,548 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 4,945,605,829,220,740,000 kg. The equatorial circumference of Larissa is 609.5 km. The mean radius of Larissa is 97.0 km. The surface area of Larissa is 118,236.98 km2. The surface gravity of the said item is 0.035 m/s2. The average orbit velocity, that is the speed at which it orbits is 34,693.4 km/h.

The orbital inclination, the angle at which Larissa orbits in relation to the orbital plane is 0.205 degrees. The orbital eccentricity is 0.0014, it is the degree at which Larissa orbits close to a circular (0) orbit as opposed to an elliptical (1) orbit.

## Larissa Facts

Type | Moon |

Orbital Circumference | 462,115.49 km |

Furthest from parent (Apoasis) | 73,651 km |

Mass | 4,945,605,829,220,740,000 kg |

Density | 1.3 g/cm3 |

Volume | 3,822,996 km3 |

Year of Discovery | 1982 |

Discoverer | H. Reitsema, W. Hubbard, L. Lebofsky, D. Tholen |

Orbital Period | 0.555 |

Semi-Major Axis | 73,548 km |

Mass | 4,945,605,829,220,740,000 kg |

Equatorial Circumference | 609.5 km |

Mean Radius | 97.0 km |

Surface Area | 118,236.98 km2 |

Surface Gravity | 0.035 m/s2 |

Average Orbit Velocity | 34,693.4 km/h |

Orbital Inclination | 0.205 |

Orbital Eccentricity | 0.0014 |

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