Home/Basic Physics/Gravitation/Orbital period10. GravitationOrbital periodIn 10. GravitationFormulaCopy LaTeXT=2πr3GMT=2\pi\sqrt{\frac{r^3}{GM}}T=2πGMr3EquivalentlyCopy LaTeXT2=4π2GMr3T^2=\frac{4\pi^2}{GM}r^3T2=GM4π2r3Tagsphysicsphysics formulagravitationDetailPeriod of a circular orbit; the square of the period is proportional to the cube of the radius.Explore the ideaExplore the ideaFound an error? Contact us.Related formulasRelatedCircular orbital velocityvorb=GMrv_{\text{orb}}=\sqrt{\frac{GM}{r}}vorb=rGMOpen formulaOpen in section