标题： 钱樊卫星的亮度特性及一些卫星翻滚的证据 显示英文标题

标题： Brightness Characteristics of the Qianfan Satellites and Evidence That Some Are Tumbling

摘要： 钱Fan卫星的平均视星等为5.76±0.04，而调整到1000公里距离后的平均星等为5.24±0.04，基于1161次观测。 几颗航天器的光变曲线显示出快速的周期性波动，这表明它们在翻滚。 几乎所有非翻滚卫星的观测都可以用漫反射、面向地球的表面来建模。 除非减轻这些卫星的亮度，否则钱Fan星座将影响天文研究和夜空的审美欣赏。 显示英文摘要

摘要： The mean apparent magnitude of the Qianfan satellites is 5.76 +/- 0.04, while the mean of magnitudes adjusted to a distance of 1,000 km is 5.24 +/- 0.04, based on 1,161 observations. Light curves of several spacecraft display rapid periodic fluctuations which indicate that they are tumbling. Nearly all of the non-tumbling satellite observations can be modeled with diffusely reflecting, Earth-facing surfaces. The Qianfan constellation will impact astronomical research and aesthetic appreciation of the night sky unless their brightness is mitigated.