Fig. 3.
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PD (in percent) of light reflected from the surface of a spherical star as a function of the phase angle α and separation parameter d/r. The magenta line represents the eclipse limit given by Eq. (16), above which the reflected flux is zero (white area). To highlight the behavior near eclipses, each contour below 10% is half the PD of the previous one, down to 0.375%.
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