Ionization potential depressions of C plasma at electron temperatures and densities of 120 eV and 4.30 × 10²² cm⁻³ (a), 189.00 eV and 8.70 × 10²² cm⁻³ (b), 251 eV and 2.06 × 10²³ cm⁻³ (c), 303 eV and 4.32 × 10²³ cm⁻³ (d), 373 eV and 1.06 × 10²⁴ cm⁻³ (e), and 496 eV and 3.51 × 10²⁴ cm⁻³ (f). These plasma conditions are deduced from the standard solar model (Bahcall & Ulrich 1988; Guenther et al. 1992) at radius fractions of 0.796 R_⊙, 0.7133 R_⊙, 0.6195 R_⊙, 0.5442 R_⊙, 0.4597 R_⊙, and 0.3529 R_⊙, respectively. Our results are compared with those of the Debye–Hückel (DH; Debye & Hückel 1923), Stewart–Pyatt (SP; Stewart & Pyatt 1966), ion-sphere (IS; Rozsnyai 1972), and Ecker–Kröll (EK; Ecker & Kröll 1963) analytical models. The description of the line style shown in plot (a) applies to all plots (a)–(f).