# Herse, Moon of Jupiter

Herse is a Moon that orbits round the planet Jupiter. Its orbit circumference, the total distance it travels round its planetary parent is 144,745,680.45 km. The furthest it gets from its orbital parent (apoasis) is 29,239,867 km. Its mass is estimated/calculated at being 14,986,684,330,972 kg. Its density has been calculated at being 2.6 g/cm3. Its volume is 4 km3.

Herse was discovered on 27 February 2003 by Brett J. Gladman, John J. Kavelaars, Jean-Marc Petit, and Lynne Allen.

The orbital period, i.e. the period it takes to complete an orbit round Jupiter is 734.52 days. The figure is also known as the sidereel period. The figure comes from N.A.S.A..

The Semi-Major Axis of the orbit is 23,405,000 km, which is the furthest point from the centre to the edge of an elliptical point.

The equatorial circumference of Herse is 6.3 km. The mean radius, that is the average radius of Herse is 1.0 (assuming an albedo of 0.04) km. The surface area of Herse is 12.57 km2. The surface gravity of the said item is 0.001 m/s2. The average orbit velocity, that is the speed at which it orbits is 8,210.6 km/h.

The orbital inclination, the angle at which Herse orbits in relation to the orbital plane is 164.815 degrees. The orbital eccentricity is 0.2493, it is the degree at which Herse orbits close to a circular (0) orbit as opposed to an elliptical (1) orbit.

## Carme Moon Group

Carme is the largest of the group of Jovian moons referred to as the Carme group. They have all been grouped together because it is believed they all shared the same common source. In addition to the supposed common source, all the members of the group are non-spherical and retrograde, that is they all orbit the planet Jupiter in the opposite direction that Jupiter rotates. As they are all retrograde in the group, they all end with the letter "e" as dictated by the International Astronomical Union, the international body that defines the names. Although some names have not yet been agreed upon. Kiddle

## Herse Facts

 Type Moon Orbital Circumference 144,745,680.45 km Furthest from parent (Apoasis) 29,239,867 km Mass 14,986,684,330,972 kg Density 2.6 g/cm3 Volume 4 km3 Orbital Direction Retrograde, opposite to the parents direction Date of Discovery 27 February 2003 Discoverer Brett J. Gladman, John J. Kavelaars, Jean-Marc Petit, and Lynne Allen Orbital Period 734.52 Semi-Major Axis 23,405,000 km Equatorial Circumference 6.3 km Mean Radius 1.0 (assuming an albedo of 0.04) km Surface Area 12.57 km2 Surface Gravity 0.001 m/s2 Average Orbit Velocity 8,210.6 km/h Orbital Inclination 164.815 Orbital Eccentricity 0.2493