Radial velocity curve of the secondary star at quiescence. The value of |$K_2$| obtained is |$158.6 \pm 0.7$| km s|$^{-1}$|⁠, with a goodness of fit |$\chi ^2 = 54.3$| with 60 deg of freedom and standard deviation |$\sigma =0.95$|⁠. Note that the data fit a circular orbit reasonably.