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The thermodynamic parameters of the superconducting state in Calcium underthe pressure at 200 GPa have been determined. The numerical analysis by usingthe Eliashberg equations in the mixed representation has been conducted. It hasbeen stated, that the critical temperature ($T_{C}$) decreases from 36.15 K to20.79 K dependently on the assumed value of the Coulomb pseudopotential($\mu^{*}\in<0.1,0.3>$). Next, the order parameter near the temperature of zeroKelvin ($\Delta(0)$) has been obtained. It has been proven, that thedimensionless ratio $2\Delta(0)/k_{B}T_{C}$ decreases from 4.25 to 3.90together with the growth of $\mu^{*}$. Finally, the ratio of the electroneffective mass to the electron bare mass ($m^{*}_{e}/m_{e}$) has beencalculated. It has been shown, that $m^{*}_{e}/m_{e}$ takes the high value inthe whole range of the superconducting phase's existence, and its maximum isequal to 2.23 for T=T_{C}.

The superconducting phase of Calcium under the pressure at 200 GPa: the strong-coupling description