Robuta

https://www.wolframalpha.com/input?i=circular+orbit+speed circular orbit speed - Wolfram|Alpha circular orbitspeedwolframalpha https://arxiv.org/abs/1410.6265 [1410.6265] Marginally stable circular orbit of a test body in spherically symmetric and static... Abstract page for arXiv paper 1410.6265: Marginally stable circular orbit of a test body in spherically symmetric and static spacetimes https://arxiv.org/abs/2505.02107 [2505.02107] Upper bound on the radius of the innermost stable circular orbit of black holes Abstract page for arXiv paper 2505.02107: Upper bound on the radius of the innermost stable circular orbit of black holes