Similar mean orbital elements led the discoverers to postulate a common origin for the group in a break up of a larger body.
The diagram illustrates the Gallic group in relation to other irregular satellites of Saturn. The eccentricity of the orbits is represented by the yellow segments (extending from the pericentre to the apocentre) with the inclination represented on Y axis.
The four members of the group are (in order of increasing distance from Saturn):
Remarkably, recent observations revealed that the largest member of the group, Albiorix, displays actually two different colours: one compatible with Eriapo and Tarvos, and another less red. Instead of the common progenitor, it was postulated that Tarvos and Erriapus could be fragments of Albiorix, leaving a large, less red crater. Such an impact would require a body with the diameter in excess of 1 km and relative velocity close to 5 km/s, resulting in a large crater with the radius of 12 km. Numerous, very large craters observed on Phoebe, prove the existence of such collisions in the Saturnian system's past.
Canal open to lagardere. (Business).(Canal Plus Group chairman-CEO Bertrand Meheut admits that the Gallic paybox could be sold to Lagardere)(Brief Article)
Jul 01, 2003; PARIS -- Canal Plus Group chairman-CEO Bertrand Meheut has publicly admitted that the troubled Gallic paybox could be sold to...