Recent data from the James Webb Space Telescope indicates that the moon Nereid is likely an indigenous remnant of Neptune's original satellite system.

詹姆斯·韋伯太空望遠鏡的最新數據顯示，衛星 Nereid 很可能是海王星原始衛星系統的本土殘留物。

The current understanding of the Neptunian system is predicated on the historical arrival of Triton, a massive satellite that entered the system from the outer solar periphery. This event precipitated a systemic destabilization, resulting in the displacement or destruction of the planet's primordial companions. While previous hypotheses suggested that Nereid was a captured object originating from the Kuiper Belt, spectroscopic analysis conducted by a California Institute of Technology team reveals a high ice concentration inconsistent with Kuiper Belt objects. Consequently, the probability of Nereid being an external interloper has been significantly diminished.

目前對海王星系統的理解是基於特里頓（Triton）在歷史上的抵達，這是一顆從太陽系外圍進入該系統的巨大衛星。這一事件導致了系統性的不穩定，使得該行星的原始伴星被移位或毀滅。雖然之前的假設認為 Nereid 是源自古波帶（Kuiper Belt）而被捕捉的物件，但由加州理工學院團隊進行的光譜分析顯示，其高冰濃度與古波帶物件不符。因此，Nereid 是外部入侵者的可能性已顯著降低。

Nereid's orbital characteristics are notably eccentric, with a revolution period approximating one Earth year and a periapsis and apoapsis ranging from 1.4 million to 9.6 million kilometers. This anomalous trajectory is interpreted by planetary astronomer Scott Sheppard as consistent with a body that formed in proximity to Neptune before being propelled outward by Triton's gravitational influence. Furthermore, the research team posits that the current inner satellites of Neptune likely materialized from the debris of the original moons destroyed during the Triton event. Despite these insights, the scarcity of in situ data—with Voyager 2 providing the sole visit in 1989—necessitates further exploration, although no subsequent missions are currently scheduled.

Nereid 的軌道特性顯著地離心，公轉週期約為一個地球年，近日點與遠日點範圍從 140 萬至 960 萬公里。行星天文學家 Scott Sheppard 將此異常軌道解釋為與一個在海王星附近形成，隨後被特里頓重力影響推向外圍的天體一致。此外，研究團隊假設海王星目前的內衛星可能是由特里頓事件期間被摧毀的原始衛星碎片所組成。儘管有這些見解，但由於缺乏原位數據——僅有 1989 年的航海家 2 號唯一一次訪問——使得進一步探索成為必要，儘管目前尚未計劃後續任務。

Nereid is now identified as a probable survivor of Neptune's original satellite population, though definitive confirmation requires future spacecraft missions.

Nereid 現在被認定為海王星原始衛星族群中可能的倖存者，儘管最終確認仍需要未來的太空船任務。