Ganymedes on üks planeedi Jupiter kuudest. Tegemist on suurima kuuga Päikesesüsteemis. Orbiidi iseloomustus: periapsiid 1 069 200 km, apoapsiid 1 072 600 km, orbiidi pikem pooltelg 1 070 400 km.
A spacecraft's periapsis altitude can be raised by increasing the spacecraft's energy at apoapsis.This can be accomplished by firing on-board rocket thrusters when at apoapsis.
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