Binding energies of different states (s,ν) of a hydrogen atom as functions of pseudomomentum K_⊥ at B = 3.16 × 10¹⁰ G (left), B = 10¹¹ G (middle), and B = 10¹² G (right). Numerical calculations (dots) are compared with the analytical approximation presented in Appendix A.1 (solid lines). For comparison, the fit previously developed for B ≳ 10¹² G (Potekhin 1998) is shown by the dashed lines in the upper right panel.