To deploy a lunar habitable base, a new elemental composition of the system for providing a thermal regime is being developed. To reduce the mass and increase the reliability of the operation of a radiation heat exchanger of the system of providing thermal regime under the conditions of the lunar surface, it is proposed to replace the radiant duralumin panel of the radiation heat exchanger with heat pipes by a highly conductive radiant panel of hybrid structure based on pyrolytic graphite. This paper is devoted to determining the thermophysical properties of an anisotropic hybrid structure based on graphite. The thermal diffusivity and thermal conductivity of samples were determined by the laser flash method. Approximations of the dependences of the in-plane and out-of-plane thermal diffusivities and thermal conductivity of the hybrid structure from pyrolytic graphite on temperature for the temperature range 256–372 K have been obtained.