Universe Guide

Larissa, Moon of Neptune

Larissa is a Moon that orbits round the planet Neptune. Its mass is estimated/calculated at being 4,945,605,829,220,740,000 kg. Its density has been calculated at being 1.3. Its volume is 3822996.

It was discovered in the year 1982 by H. Reitsema, W. Hubbard, L. Lebofsky, D. Tholen.

The orbital period, i.e. the period it takes to complete an orbit round Neptune is 0.55465 days. The figure is also known as the sidereel period. The figure comes from N.A.S.A..

The Equatorial Radius of the object is 97km. The value is the radius in km of the said object at the Equator.

The Escape Velocity of the object is 297 km/h. The Escape Velocity is the speed an object needs to be travelling in order to break free from the objects gravity. The larger an object is, the more velocity (speed) is needed to break free from the object.The Semi-Major Axis of the orbit is 73.548, which is the furthest point from the centre to the edge of an elliptical point.

The equatorial circumference of Larissa is 609.5 km. The surface area of Larissa is 118,236.98. The surface gravity of the said item is 0.035. The Mean orbit velocity, that is the speed at which it orbits is 34693.40 km/h. The is the average distance in km of the object is from its parent 73548.00.

The orbital inclination, the angle at which Larissa orbits in relation to the orbital plane is 0.2 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

Mass (kg)4,945,605,829,220,740,000
Density (g/cm^3)1.3
Volume (km^3)3822996
Orbital DirectionPrograde, same as the parents direction
Year of Discovery1982
DiscovererH. Reitsema, W. Hubbard, L. Lebofsky, D. Tholen
Orbital Period (days)0.55465
Equatorial Radius (km)97
Escape Velocity (km/h)297
Semi-Major Axis (10^3 km)73.548
Equatorial Circumference (km)609.5
Surface Area (km^2)118,236.98
Surface Gravity (m/s^2)0.035
Mean Orbit Velocity (km/h)34693.40
Average Orbit Distance (km)73548.00
Orbital Inclination (degrees)0.2
Orbital Eccentricity0.0014

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