KnowraPeriapsisLinked fromLinked fromThe 13 pages that link to Periapsis, each with the reason it gives.All 13Broader topic 4Related 7Narrower topic 2Vis-viva equationBroader topic: The vis-viva equation predicts the orbiting body's maximum speed there.Planetary orbitBroader topic: For a planet orbiting a star, this is the orbit’s closest approach.Oberth effectBroader topic: A burn there takes advantage of the orbit's maximum speed.Bi-elliptic transferBroader topic: The first and third impulses occur at the circular-orbit radii, which are periapsis points of the transfer arcs.