The D68 ringlet is the innermost feature in Saturn’s rings. Four clumps that appeared in D68 around 2014 remained evenly spaced about 30 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.

D68 小环是土星环中最内层的特征。2014 年左右出现在 D68 中的四个团块保持均匀间隔约 30，并且从 2014 年到 2017 年进行最后一次测量为止，彼此相对移动非常缓慢。 D68 的狭窄和团块的分布可能表明我们收集了源体处于同轨道配置或暗示外力限制了观察到的尘埃和任何源体。在本文中，我们探讨了这四个团块来自同轨道配置中的四个源体的可能性。我们发现没有四个质量的解产生观察到的间距。因此，我们考虑一个看不见的第五个共轨天体是否可以解释角间距的差异并接近稳定的静止配置。我们为五个共轨天体找到了一系列解决方案，其中它们的质量比取决于第五个质量的假定位置。五个共轨道的数值模拟对初始条件高度敏感，特别是对于我们预期 D68 团块具有的质量范围。我们的 D68 共轨系统模型的脆弱性意味着可能有一些外力限制了这个小环中的材料。特别是对于我们期望 D68 团块具有的质量范围。我们的 D68 共轨系统模型的脆弱性意味着可能有一些外力限制了这个小环中的材料。特别是对于我们期望 D68 团块具有的质量范围。我们的 D68 共轨系统模型的脆弱性意味着可能有一些外力限制了这个小环中的材料。