论文标题
冥王星 - 夏隆系统的卫星的轨道测定
Orbit determination of the moons of the Pluto-Charon system
论文作者
论文摘要
目前已知四个小卫星（Styx，Nix，Kerberos和Hydra）围绕着冥王星和夏隆的Barycenter绕，由于它们的质量比相对较高，它们本身就被视为二进制矮人。中心的非轴对称电势会引起月球轨道不方便，可以通过开普勒的倾斜元件来描述。在这里，我们报告说，观察到的轨道变化可能不是轨道偏心率或观察不确定性的结果，但可能是由于中央二元造成的强制振荡所致。我们使用数值集成和分析考虑表明，在其轨道元素上报告的差异很可能是由于这种内在行为而不是对我们的工具的局限性产生的。
Four small moons (Styx, Nix, Kerberos and Hydra) are at present known to orbit around the barycenter of Pluto and Charon, which are themselves considered a binary dwarf-planet due to their relatively high mass ratio. The central, non-axisymmetric potential induces moon orbits inconvenient to be described by Keplerian osculating elements. Here, we report that observed orbital variations, may not be the result of orbital eccentricities or observational uncertainties, but may be due to forced oscillations caused by the central binary. We show, using numerical integration and analytical considerations, that the differences reported on their orbital elements, may well arise from this intrinsic behavior rather than limitations on our instruments.
