Universe Guide

Despina, Moon of Neptune

Despina is a Moon that orbits round the planet Neptune. Its mass is estimated/calculated at being 2,098,135,806,336,070,000 kg. Its density has been calculated at being 1.3. Its volume is 1767146.

It was discovered in the year 1989 by S. Synnott, Voyager 2.

The orbital period, i.e. the period it takes to complete an orbit round Neptune is 0.33466 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 75km. The value is the radius in km of the said object at the Equator.

The Escape Velocity of the object is 220 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 52.526, which is the furthest point from the centre to the edge of an elliptical point.

The equatorial circumference of Despina is 471.2 km. The surface area of Despina is 70,685.83. The surface gravity of the said item is 0.025. The Mean orbit velocity, that is the speed at which it orbits is 41048.60 km/h. The is the average distance in km of the object is from its parent 52526.00.

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

Mass (kg)2,098,135,806,336,070,000
Density (g/cm^3)1.3
Volume (km^3)1767146
Orbital DirectionPrograde, same as the parents direction
Year of Discovery1989
DiscovererS. Synnott, Voyager 2
Orbital Period (days)0.33466
Equatorial Radius (km)75
Escape Velocity (km/h)220
Semi-Major Axis (10^3 km)52.526
Equatorial Circumference (km)471.2
Surface Area (km^2)70,685.83
Surface Gravity (m/s^2)0.025
Mean Orbit Velocity (km/h)41048.60
Average Orbit Distance (km)52526.00
Orbital Inclination (degrees)0.07
Orbital Eccentricity0.000

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