论文标题
持续的PSP/WISPR观察到了与Phaethon相关的灰尘步道
Continued PSP/WISPR Observations of a Phaethon-related Dust Trail
论文作者
论文摘要
我们提出了对沿着小行星（3200）菲森（Phaethon）轨道近距离观察到的尘埃径的第一个白光检测的更新，如宽阔的成像仪在NASA Parker Solar Probe（PSP）任务上的宽阔图像仪（WISPR）仪器所见。在这里，我们提供了对2018年10月至2021年8月之间九个独立任务遇到的尘埃径的摘要和分析，这使航天器的方法达到了Phaethon轨道的0.0277 AU之内。 We find the photometric and estimated dust mass properties to be inline with those in the initial publication, with a visual (V) magnitude of approximately 16.1$\pm$0.3 per pixel, corresponding to a surface brightness of 26.1 mag arcsec$^{-2}$, and an estimated mass of dust within the range $10^{10}$ kg - $10^{12}$ kg depending on the assumed dust 特性。但是，这项调查的主要发现是发现尘埃径的发现并不能完美地遵循Phaethon的轨道，但它们之间的明确分离是随着真正异常的函数而增加的，尽管该步道可能与Phaethon的轨道不同，而Periapsis中的轨道却只有1度。
We present an update to the first white-light detections of a dust trail observed closely following the orbit of asteroid (3200) Phaethon, as seen by the Wide-field Imager for Parker Solar Probe (WISPR) instrument on the NASA Parker Solar Probe (PSP) mission. Here we provide a summary and analysis of observations of the dust trail over nine separate mission encounters between October 2018 and August 2021 that saw the spacecraft approach to within 0.0277 au of the orbit of Phaethon. We find the photometric and estimated dust mass properties to be inline with those in the initial publication, with a visual (V) magnitude of approximately 16.1$\pm$0.3 per pixel, corresponding to a surface brightness of 26.1 mag arcsec$^{-2}$, and an estimated mass of dust within the range $10^{10}$ kg - $10^{12}$ kg depending on the assumed dust properties. However, the key finding of this survey is the discovery that the dust trail does not perfectly follow the orbit of Phaethon, with a clear separation noted between them that increases as a function of true anomaly, though the trail may differ from Phaethon's orbit by as little as 1-degree in periapsis.
