# Himalia, Moon of Jupiter

Himalia is a Moon that orbits round the planet Jupiter. Its mass is estimated/calculated at being 6,744,007,948,937,370,000 kg. Its density has been calculated at being 2.6. Its volume is 2572441.

Himalia was discovered on 3 December 1904 by Charles Dillon Perrine.

The orbital period, i.e. the period it takes to complete an orbit round Jupiter is 250.5662 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 85km. 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 370 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 11460, which is the furthest point from the centre to the edge of an elliptical point.

The equatorial circumference of Himalia is 534.1 km. The surface area of Himalia is 90,792.03. The surface gravity of the said item is 0.062. The Mean orbit velocity, that is the speed at which it orbits is 11895.90 km/h. The is the average distance in km of the object is from its parent 11461000.00.

The orbital inclination, the angle at which Himalia orbits in relation to the orbital plane is 27.63 degrees. The orbital eccentricity is 0.1623, it is the degree at which Himalia orbits close to a circular (0) orbit as opposed to an elliptical (1) orbit.

## Legend of Himalia

Himalia was a nymph in ancient Greek mythology. Himalia was seduced by Zeus when Zeus came to visit Rhodes to subdue Titanes,a Rhodean inhabitant. As a result of the seduction, Himalia had three sons, Spartaios, Kronios and Kytos. 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

## Himalia Facts

 Type Moon Mass (kg) 6,744,007,948,937,370,000 Density (g/cm^3) 2.6 Volume (km^3) 2572441 Orbital Direction Prograde, same as the parents direction Date of Discovery 3 December 1904 Discoverer Charles Dillon Perrine Orbital Period (days) 250.5662 Equatorial Radius (km) 85 Albedo 0.04 Escape Velocity (km/h) 370 Semi-Major Axis (10^3 km) 11460 Equatorial Circumference (km) 534.1 Surface Area (km^2) 90,792.03 Surface Gravity (m/s^2) 0.062 Mean Orbit Velocity (km/h) 11895.90 Average Orbit Distance (km) 11461000.00 Orbital Inclination (degrees) 27.63 Orbital Eccentricity 0.1623 Source(s) https://solarsystem.nasa.gov/moons/jupiter-moons/himalia/in-depth/https://nssdc.gsfc.nasa.gov/planetary/factsheet/joviansatfact.html