2018年USAAAO短问题第2道
来自astro-init
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?
