Linked from

The 13 pages that link to Periapsis, each with the reason it gives.

• Vis-viva equationBroader topic: The vis-viva equation predicts the orbiting body's maximum speed there.

• Mercury's perihelion precessionNarrower topic: Mercury’s perihelion is its periapsis around the Sun.

• Hohmann transfer orbitRelated: The first burn usually occurs here when transferring outward from a lower circular orbit.

• Semimajor axisRelated: Its distance is the semimajor axis multiplied by one minus orbital eccentricity.

• PerihelionNarrower topic: This general term applies when the central body is not the Sun.

• Planetary orbitBroader topic: For a planet orbiting a star, this is the orbit’s closest approach.

• True anomalyRelated: Its direction defines zero true anomaly.

• Oberth effectBroader topic: A burn there takes advantage of the orbit's maximum speed.

• Orbital precessionRelated: The changing direction toward periapsis defines apsidal rotation.

• Kepler's equationRelated: Both anomalies are conventionally measured from this orbital reference point.

• Bi-elliptic transferBroader topic: The first and third impulses occur at the circular-orbit radii, which are periapsis points of the transfer arcs.

• Kepler orbitRelated: It anchors the orbit's orientation and marks the point of greatest speed in a bound orbit.

• Frozen orbitRelated: Its direction and distance define key aspects of the orbit’s shape and orientation.