Universe Sandbox Wiki

The Apocenter Distance of an object's orbit is the distance from its Orbital Parent to the apocenter, or farthest point, of the orbit. The Apocenter Distance of an object with a circular orbit is equal to its Semi-Major Axis.

The apocenter of an object orbiting the Sun is sometimes referred to as the aphelion, while the apocenter of an object orbiting the Earth is sometimes called the apogee. Apocenter is also synonymous with apoapse, although this term usually refers to the apocenter distance rather than the apocenter point.

Property Details[]


The Apocenter Distance property is located near the top of the Orbital Elements section of the Motion tab in an object's properties panel, if the object has an Orbital Parent. It is a lockable property with Semi-Major Axis, Pericenter Distance, and Eccentricity.


Apocenter Distance can be viewed and edited using the following units:

  • Milky Way Galaxy radius (milky way) = 5.5×104 light year
  • Parsec (parsec) = 3.08568025×1016 m
  • Light-year (light year) = 9.46073047×1015 m
  • Astronomical Unit (AU) = 1.495978707×1011 m
  • Solar radius (sun) = 6.955×108 m
  • Lunar distance (lunar dist) = 3.844×108 m
  • Light-second (light sec) = 2.99792458×108 m
  • Jupiter radius (jupiter) = 6.9911×107 m
  • Earth radius (earth) = 6.37101×106 m
  • Moon radius (moon) = 1.7371×106 m
  • Kilometer (km) = 1000 m
  • Meter (m) is the SI base unit for length
  • Centimeter (cm) = 0.01 m
  • Millimeter (mm) = 0.001 m