WDA and WDB apsidal-motion constants

The internal structure constants k_j_ and the radius of gyration are useful tools for investigating the apsidal motion and tidal evolution of close binaries and planetary...内部结构常数k_j_与回转半径（radius of gyration）是研究密近双星（close binaries）与行星的近心点运动（apsidal motion）及潮汐演化（tidal evolution）的有效工具。