2018年USAAAO短问题第2道

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Jingsong Guo（讨论 | 贡献）2020年3月9日 (一) 18:11的版本 （创建页面，内容为“==英文题目== 2. [5 pt] Planet Nine is a hypothesized planet in the outer Solar System that may explain the clustering of orbital elements of distant trans-Neptu…”）
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英文题目

2. [5 pt] Planet Nine is a hypothesized planet in the outer Solar System that may explain the clustering of orbital elements of distant trans-Neptunian objects. The hypothesized periapse of Planet Nine is 200 AU, and the apoapse is expected to be at approximately 1200 AU. What would the eccentricity of Planet Nine be? How does this eccentricity compare to that of the 8 major planets in the Solar System?

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