The configuration of Fraternite-Egalite2-Egalitel in the Neptune ring arcs system

摘要

By considering the finite mass of Fraternite, although small, it is shown that there are two time-averaged stationary points in its neighborhood due to the reaction of the test body to the fields of Neptune, Galatea, and Fraternite. These two locations measuring 11.7° and 13.8° from the center of Fraternite could correspond to the locations of Egalite 2 and Egalite 1. This model accounts for the 10° span of Fraternite and estimates its mass at m_f = 6.4 x 10~(16) kg. The eccentricities of Egalite 2 and Egalite 1 are believed to be about e = 5 x 10~(-4).