Near rectilinear halo orbits (NRHOs), a subset of the $$L_1$$ L 1 and $$L_2$$ L 2 halo orbit families, are strong candidates for a future inhabited facility in line with the goals for NASA’s long-term cislunar transportation network. Higher-period dynamical structures that bifurcate from the NRHO region of the $$L_2$$ L 2 halo family offer additional insight into motion departing from or arriving into the vicinity. Characteristics of the NRHOs and the higher-period orbits, including stability and eclipse-avoidance properties, are presented and their persistence is verified in a higher-fidelity ephemeris model.

中文翻译：

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近直线晕轨道和附近的高周期动力结构：轨道稳定性和共振特性

近直线晕轨道 (NRHO) 是 $$L_1$$ L 1 和 $$L_2$$ L 2 晕轨道家族的一个子集，是符合 NASA 长期顺月轨道目标的未来有人居住设施的有力候选者交通网络。从 $$L_2$$ L 2 晕族的 NRHO 区域分叉的高周期动力结构提供了对离开或到达附近的运动的额外洞察。介绍了 NRHO 和更高周期轨道的特性，包括稳定性和避免日食的特性，并在更高保真星历模型中验证了它们的持久性。