# Tethys, Moon of Saturn

Tethys is a Moon that orbits round the planet Saturn. Its mass is estimated/calculated at being 617,551,805,221,061,000,000 kg. Its density has been calculated at being 0.973. Its volume is 634264255.

It was discovered in the year 1684 by G.D. Cassini.

The orbital period, i.e. the period it takes to complete an orbit round Saturn is 1.8878 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 533km. The value is the radius in km of the said object at the Equator.

The Escape Velocity of the object is 0.39321974 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 294.66, which is the furthest point from the centre to the edge of an elliptical point.

The equatorial circumference of Tethys is 3348.9 km. The surface area of Tethys is 3,569,967.66. The surface gravity of the said item is 0.145. The Mean orbit velocity, that is the speed at which it orbits is 40860.70 km/h. The is the average distance in km of the object is from its parent 294672.00.

The orbital inclination, the angle at which Tethys orbits in relation to the orbital plane is 1.86 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.

## Tethys Facts

 Type Moon Mass (kg) 617,551,805,221,061,000,000 Density (g/cm^3) 0.973 Volume (km^3) 634264255 Orbital Direction Prograde, same as the parents direction Year of Discovery 1684 Discoverer G.D. Cassini Orbital Period (days) 1.8878 Equatorial Radius (km) 533 Escape Velocity (km/h) 0.39321974 Semi-Major Axis (10^3 km) 294.66 Equatorial Circumference (km) 3348.9 Surface Area (km^2) 3,569,967.66 Surface Gravity (m/s^2) 0.145 Mean Orbit Velocity (km/h) 40860.70 Average Orbit Distance (km) 294672.00 Orbital Inclination (degrees) 1.86 Orbital Eccentricity 0.0001 Source(s) https://solarsystem.nasa.gov/moons/saturn-moons/tethys/in-depth/https://nssdc.gsfc.nasa.gov/planetary/factsheet/saturniansatfact.html

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