  The D68 ringlet is the innermost feature in Saturn's rings. Four clumps that
appeared in D68 around 2014 remained evenly spaced about 30 degrees apart and
moved very slowly relative to each other from 2014 up until the last
measurements were taken in 2017. D68's narrowness and the distribution of
clumps could either indicate that we have a collection of source bodies in a
co-orbital configuration or imply that an outside force confines the observed
dust and any source bodies. In this paper we explore the possibility that these
four clumps arose from four source bodies in a co-orbital configuration. We
find that there are no solutions with four masses that produce the observed
spacings. We therefore consider whether an unseen fifth co-orbital object could
account for the discrepancies in the angular separations and approach a stable
stationary configuration. We find a range of solutions for five co-orbital
objects where their mass ratios depend on the assumed location of the fifth
mass. Numerical simulations of five co-orbitals are highly sensitive to initial
conditions, especially for the range of masses we would expect the D68 clumps
to have. The fragility of our D68 co-orbital system model implies that there is
probably some outside force confining the material in this ringlet.
