Io waa dayaxa shanaad ee ka baxsan Jupiter. Io waxay qaadataa qiyaastii 42.5 saacadood si ay u dhammaystirto hal wareeg oo Jupiter ah (si dhakhso ah oo dhaqdhaqaaqeeda loo arki karo hal habeen oo aragti ah). Io wuxuu ku jiraa 2: 1 dhaqdhaqaaqa wareega wareega ee Europa iyo 4: 1 dhaqdhaqaaqa wareega wareega ee Ganymede, isagoo dhammaystiraya laba wareeg oo Jupiter ah hal wareeg oo kasta oo ay dhammaystirtay Europa, iyo afar wareeg oo kasta oo ay dhammaystirtay Ganymede. Tani waxay ka caawineysaa resonance Io's eccentric orbital moon (0.0041), taas oo bixisa dhaqdhaqaaqa ugu muhiimsan ee wareega wareega ee Jupiter.
42.5 saacadood