PHOEBE’s orbital solution of FK Aqr based on RV measurements. Upper panel: RV measurements of both components are given with symbols according to the legend in the upper right corner: symbols ‘p’ and ‘s’ stand for the primary and secondary, respectively. The Phoebe model is given in black lines. Lower panel: RV residuals according to the same legend given in the upper left corner. In both panels, all error bars are plotted, but in most cases they are within the symbols of the measurements.