apocentre BrE
apocenter AmE

The yellow segments extend from the pericentre to the apocentre, showing the eccentricity.

For the ellipse there is also an apocentre for which the distance to the focus takes the maximal value .

The eccentricity of the orbits is represented by the yellow segments (extending from the pericentre to the apocentre) with the inclination represented on Y axis.

A star near apocentre, the slowest part of its orbit, will tend to fall into a groove and then follow the groove, picking up momentum as it goes.

The diagram illustrates the orbital parameters of the retrograde irregular satellites of Uranus (in polar co-ordinates) with the eccentricity of the orbits represented by the segments extending from the pericentre to the apocentre.