Median parallax difference between six- and five-parameter solutions as a function of ν_eff and G for the 8 million sources with both kinds of solutions. The panels show selections depending on ecliptic latitude β: southern hemisphere (panel a), all latitudes (panel b), and northern hemisphere (panel c). In this sample no sources lie outside of the interval 1.24 < ν_eff < 1.72 μm⁻¹.