Orbit Apocentre Calculator: Determine Farthest Orbital Point

Calculate Orbital Apocentre Distance

The average distance from the center of the orbit to its farthest point (or half of the longest diameter).
A dimensionless parameter describing how much an orbit deviates from a perfect circle (0 for circle, <1 for ellipse).

Use our Orbit Apocentre Calculator to quickly determine the farthest point in an object's elliptical orbit from its primary body. Simply input the semi-major axis and orbital eccentricity to find the apocentre distance, crucial for satellite planning, space mission analysis, and understanding celestial mechanics.

Formula:

The apocentre distance (rapo) is calculated using the formula:

rapo = a(1 + e)

  • a = Semi-major axis of the orbit (e.g., in kilometers or Astronomical Units)
  • e = Orbital eccentricity (a dimensionless value)

Physics and Orbital Mechanics Tools

Circular Velocity

Go to Calculator

Orbit Pericenter Distance : Determine Periapsis for Any Orbit

Go to Calculator