The most appreciable changes in their orbits occur approximately every 6.2 years, when the periapsis of Pandora lines up with the apoapsis of Prometheus, when they approach to within approximately 1400 km.
Os cambios máis apreciables ocorren aproximadamente cada 6,2 anos, cando a periapse de Pandora coincide coa apoapse de Prometeo, no momento en que as lúas se aproximan entre elas a uns 1400 kms.