Mass, charge, and distance to Reissner–Nordström black hole in terms of directly measurable quantities Gerardo Morales-Herrera, Pablo Ortega-Ruiz, Mehrab Momennia and Alfredo Herrera-Aguilar Eur. Phys. J. C, 84 5 (2024) 525 Published online: 24 May 2024 DOI: 10.1140/epjc/s10052-024-12880-w