oberon/Titania = 13.463/8.706 = 1.546/1 = 3.09/2
Oberon: 2 revolution, Titana 3.0 revolutions
oberon/Umbriel = 13.463/4.144 = 3.2/1 = 6.497/2 = 12.99/4
Umbriel: Oberon: 4 revolutions, Umbriel:13 revolutions
Titania/Umbriel = 8.706/4.144 = 2.10/1 = 4.2/2(no resonance)
Many additional resonances remain to be discovered.