Hamwdi, Mayada Jasim. “Orbital Element in Celestial Mechanics and Astrophysics: An In-Depth Review”. Academia Open 11, no. 1 (January 21, 2026): 10.21070/acopen.11.2026.13306. Accessed February 7, 2026. https://acopen.umsida.ac.id/index.php/acopen/article/view/13306.