Universe Guide

Sao, Moon of Neptune

Sao is a Moon that orbits round the planet Neptune. It is also know by other designations, NXI, S/2002 N2. Its mass is estimated/calculated at being 89,920,105,985,831,600 kg. Its density has been calculated at being 1.5. Its volume is 44602.

Sao was discovered on 14 August 2002 by Tommy Grav, Matthew J. Holman, John J. Kavelaars, Wesley C. Fraser, and Dan Milisavljevic.

The orbital period, i.e. the period it takes to complete an orbit round Neptune is 2914.1 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 22km. The Equatorial Radius is based on the assumption of the Albedo value. The value is the radius in km of the said object at the Equator.

The albedo of the object is 0.04. The Albedo is the amount of radiation that is reflected back into space by the object.

The Escape Velocity of the object is 84 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 22420, which is the furthest point from the centre to the edge of an elliptical point.

The equatorial circumference of Sao is 138.2 km. The surface area of Sao is 6,082.12. The surface gravity of the said item is 0.012. The Mean orbit velocity, that is the speed at which it orbits is 1988.50 km/h. The is the average distance in km of the object is from its parent 22228000.00.

The orbital inclination, the angle at which Sao orbits in relation to the orbital plane is 48.5 degrees. The orbital eccentricity is 0.1365, it is the degree at which Sao orbits close to a circular (0) orbit as opposed to an elliptical (1) orbit.

Sao Facts

DesignationsNXI, S/2002 N2
Mass (kg)89,920,105,985,831,600
Density (g/cm^3)1.5
Volume (km^3)44602
Orbital DirectionPrograde, same as the parents direction
Date of Discovery14 August 2002
DiscovererTommy Grav, Matthew J. Holman, John J. Kavelaars, Wesley C. Fraser, and Dan Milisavljevic
Orbital Period (days)2914.1
Equatorial Radius (km)22
Escape Velocity (km/h)84
Semi-Major Axis (10^3 km)22420
Equatorial Circumference (km)138.2
Surface Area (km^2)6,082.12
Surface Gravity (m/s^2)0.012
Mean Orbit Velocity (km/h)1988.50
Average Orbit Distance (km)22228000.00
Orbital Inclination (degrees)48.5
Orbital Eccentricity0.1365

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