Universe Guide

Halimede, Moon of Neptune

Halimede is a Moon that orbits round the planet Neptune. It is also know by other designations, NIX, S/2002 N1. Its mass is estimated/calculated at being 89,920,105,985,831,600 kg. Its density has been calculated at being 1.5. Its volume is 124788.

Halimede was discovered on 14 August 2002 by Matthew J. Holman, John J. Kavelaars, Tommy Grav, Wesley C. Fraser, and Dan Milisavljevic.

The orbital period, i.e. the period it takes to complete an orbit round Neptune is 1879.7 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 31km. 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 71 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 15730, which is the furthest point from the centre to the edge of an elliptical point.

The equatorial circumference of Halimede is 194.8 km. The surface area of Halimede is 12,076.28. The surface gravity of the said item is 0.006. The Mean orbit velocity, that is the speed at which it orbits is 2273.20 km/h. The is the average distance in km of the object is from its parent 16611000.00.

The orbital inclination, the angle at which Halimede orbits in relation to the orbital plane is 134.1 degrees. The orbital eccentricity is 0.2646, it is the degree at which Halimede orbits close to a circular (0) orbit as opposed to an elliptical (1) orbit.

Halimede Facts

DesignationsNIX, S/2002 N1
Mass (kg)89,920,105,985,831,600
Density (g/cm^3)1.5
Volume (km^3)124788
Orbital DirectionRetrograde, opposite to the parents direction
Date of Discovery14 August 2002
DiscovererMatthew J. Holman, John J. Kavelaars, Tommy Grav, Wesley C. Fraser, and Dan Milisavljevic
Orbital Period (days)1879.7
Equatorial Radius (km)31
Escape Velocity (km/h)71
Semi-Major Axis (10^3 km)15730
Equatorial Circumference (km)194.8
Surface Area (km^2)12,076.28
Surface Gravity (m/s^2)0.006
Mean Orbit Velocity (km/h)2273.20
Average Orbit Distance (km)16611000.00
Orbital Inclination (degrees)134.1
Orbital Eccentricity0.2646

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