# Leda, Moon of Jupiter

Leda is a Moon that orbits round the planet Jupiter. Its mass is estimated/calculated at being 10,940,279,561,609,500 kg. Its density has been calculated at being 2.6. Its volume is 4189.

Leda was discovered on 14 September 1974 by Charles T. Kowal.

The orbital period, i.e. the period it takes to complete an orbit round Jupiter is 240.92 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 10km. 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 43 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 11170, which is the furthest point from the centre to the edge of an elliptical point.

The equatorial circumference of Leda is 62.8 km. The surface area of Leda is 1,256.64. The surface gravity of the said item is 0.007. The Mean orbit velocity, that is the speed at which it orbits is 12051.00 km/h. The is the average distance in km of the object is from its parent 11165000.00.

The orbital inclination, the angle at which Leda orbits in relation to the orbital plane is 27.47 degrees. The orbital eccentricity is 0.1636, it is the degree at which Leda orbits close to a circular (0) orbit as opposed to an elliptical (1) orbit.

## Legend of Leda

Leda was once a queen of Sparta and married to King Tyndareus. Leda was seduced by Zeus who had tricked her. The result would be two children Pollux and Helen. Another story has Zeus seduced nemesis who was a goose at the time where Zeus was a swan. The result of the seduction was an egg. The egg was brought to Leda where it hatched and Helen was born. Leda would raise Helen as her child. Theoi

## Himalia Moon Group

The moon is a member of the Himalia group of Jovian Moons. All four Himalia moons in the group orbit in a prograde direction, this means they orbit in the same direction as Jupiter. They are all believed to be from the same source, possibly the remnants of an asteroid that got broken up in a collision. Himalia is the largest member of the group therefore it is the one that the group is named after. It takes just over two thirds the time the moon takes to orbit the Earth as Himalia takes to orbit Jupiter. NASA

## Leda Facts

 Type Moon Mass (kg) 10,940,279,561,609,500 Density (g/cm^3) 2.6 Volume (km^3) 4189 Orbital Direction Prograde, same as the parents direction Date of Discovery 14 September 1974 Discoverer Charles T. Kowal Orbital Period (days) 240.92 Equatorial Radius (km) 10 Albedo 0.04 Escape Velocity (km/h) 43 Semi-Major Axis (10^3 km) 11170 Equatorial Circumference (km) 62.8 Surface Area (km^2) 1,256.64 Surface Gravity (m/s^2) 0.007 Mean Orbit Velocity (km/h) 12051.00 Average Orbit Distance (km) 11165000.00 Orbital Inclination (degrees) 27.47 Orbital Eccentricity 0.1636 Source(s) https://solarsystem.nasa.gov/moons/jupiter-moons/leda/in-depth/https://nssdc.gsfc.nasa.gov/planetary/factsheet/joviansatfact.html