BlueBird 6 比 Block 1 卫星更暗
BlueBird 6 is Fainter than Block 1 Satellites
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中文总结 AI 辅助
该研究对比 BlueBird 星座 Block 2 卫星 BlueBird 6 与 Block 1 卫星的视星等,发现 BlueBird 6 亮度低 0.55 个星等,单位表面积亮度仅为 Block 1 的 17%,虽亮度超 IAU 限制但数量更少。
中文摘要 AI 辅助
BlueBird 星座的首颗 Block 2 卫星 BlueBird 6 的平均视星等为 3.85 ± 0.10,而 Block 1 航天器的平均视星等为 3.30 ± 0.07,因此 BlueBird 6 暗 0.55 个星等。同样,调整至 1000 公里统一距离后的平均视星等分别为 4.32 ± 0.08 和 3.77 ± 0.06,差值也为 0.55 个星等。这种变暗现象出乎意料,因为 Block 2 卫星的尺寸约为 Block 1 的 3.5 倍,BlueBird 6 的单位表面积亮度仅为 Block 1 航天器的 17%。文中讨论了可能的解释,所有 BlueBird 卫星均超过国际天文学联合会建议的亮度限制,但其数量将少于其他卫星星座。
英文摘要
The mean apparent magnitude for BlueBird 6, the first Block 2 satellite of the BlueBird constellation, is 3.85 +/- 0.10 while that for Block 1 spacecraft is 3.30 +/- 0.07. So, BlueBird 6 is 0.55 magnitudes fainter. Likewise, the means of apparent magnitudes adjusted to a uniform distance of 1,000 km are 4.32 +/- 0.08 and 3.77 +/- 0.06, respectively. This difference is also 0.55 magnitude. The dimming is unexpected because the Block 2 satellites are ~3.5 times as large as Block 1. BlueBird 6 is only 17% as bright as Block 1 spacecraft per unit surface area. Possible explanations are discussed. All BlueBird satellites exceed the brightness limits recommended by the International Astronomical Union. However, they will be fewer in number than other satellite constellations.
发表机构
- IAU Centre for the Protection of the Dark and Quiet Sky(国际天文学联合会暗弱天空保护中心)
机构由 AI 辅助整理,请以论文原文为准。