Equatorial radius of MACHO 80.7443.1718 at periastron as a function of the longitude obtained with the TIDES-1 models using ν = 0.028 $R_{\odot }^2$ d⁻¹ (green) and ν = 2 $R_{\odot }^2$ d⁻¹ (red), and the TIDES-1vv with λ = 0.01 (blue) and λ = 1 (magenta). The sub-binary longitude is at φ = 0°. Each dot in the plot correspond to a grid point. The smaller viscosity models display 28 wave-like oscillations in the radius over the 2π radians of the stellar circumference.