Orbital speed

The orbital speed of a body, usually a planet, a natural satellite, an artificial satellite, or a multiple star, is the speed at which it orbits around the barycenter of a system, usually around a more massive body. It can be used to refer to either the mean orbital speed, the average speed as it completes an orbit, or instantaneous orbital speed, the speed at a particular point in its orbit.

The orbital speed at any position in the orbit can be computed from the distance to the central body at that position, and the specific orbital energy, which is independent of position: the kinetic energy is the total energy minus the potential energy.

Other Languages
العربية: سرعة مدارية
English: Orbital speed
Esperanto: Orbita rapido
français: Vitesse orbitale
한국어: 공전 속도
Bahasa Indonesia: Kecepatan orbit
Lëtzebuergesch: Bunnvitess (Astronomie)
македонски: Орбитална брзина
Bahasa Melayu: Kelajuan orbit
日本語: 軌道速度
norsk nynorsk: Banefart
português: Velocidade orbital
slovenčina: Kruhová rýchlosť
slovenščina: Tirna hitrost
српски / srpski: Орбитална брзина
srpskohrvatski / српскохрватски: Orbitalna brzina
suomi: Ratanopeus
中文: 轨道速度