Universe Guide

Amalthea, Moon of Jupiter

Amalthea is a Moon that orbits round the planet Jupiter. Its mass is estimated/calculated at being 2,068,162,437,674,130,000 kg. Its density has been calculated at being 0.849. Its volume is 2434264.

It was discovered in the year 1892 by Edward Emerson Barnard.

The orbital period, i.e. the period it takes to complete an orbit round Jupiter is 0.49818 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 83km. The value is the radius in km of the said object at the Equator.

The Escape Velocity of the object is 207 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 181.4, which is the furthest point from the centre to the edge of an elliptical point.

The equatorial circumference of Amalthea is 524.3 km. The surface area of Amalthea is 87,510.98. The surface gravity of the said item is 0.020. The Mean orbit velocity, that is the speed at which it orbits is 95362.00 km/h. The is the average distance in km of the object is from its parent 181400.00.

The orbital inclination, the angle at which Amalthea orbits in relation to the orbital plane is 0.4 degrees. The orbital eccentricity is 0.0032, it is the degree at which Amalthea orbits close to a circular (0) orbit as opposed to an elliptical (1) orbit.

Amalthea is the reddest object in the Solar System, even redder than the planet Mars. It is one of four moons of Jupiter than orbit inside Io. As it is so close to the planet, it is bombarded with radiation from the planet. It takes less than half a day to complete an orbit.

Amalthea Mythology Legend

Amalthea is named after a water nymph, or to put it another way, a Naiad. Amalthea was famous as she nursed a newborn Jupiter. Although a female form, Amalthea is tended to be represented by a goat.

Inner Jupiter Moon Moon Group

The Jupiter Inner Moon Group are a small group of four moons that orbit close to the planet. The biggest of the group is Amalthea which the group is usually named after. The closest is Metis.

List of Members in Inner Jupiter Moon Group

Image of the Jupiter moon of Amalthea

Image of the Jupiter moon of Amalthea

Amalthea Facts

Mass (kg)2,068,162,437,674,130,000
Density (g/cm^3)0.849
Volume (km^3)2434264
Orbital DirectionPrograde, same as the parents direction
Year of Discovery1892
DiscovererEdward Emerson Barnard
Orbital Period (days)0.49818
Equatorial Radius (km)83
Escape Velocity (km/h)207
Semi-Major Axis (10^3 km)181.4
Equatorial Circumference (km)524.3
Surface Area (km^2)87,510.98
Surface Gravity (m/s^2)0.020
Mean Orbit Velocity (km/h)95362.00
Average Orbit Distance (km)181400.00
Orbital Inclination (degrees)0.4
Orbital Eccentricity0.0032

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