V = 1 → 0 P10 ro-vibrational CO line-profile variations during a full precession period of eccentric disk calculated in model #1 after the 600th binary orbit. For comparison, the line profiles emerging in an unperturbed circularly Keplerian disk are shown with dashed lines. Small subfigures show the disk’s apparent position with respect to the line of sight. The i = 20° and i = 60° inclination angles were assumed, shown in blue and red colors, respectively. The orbits of gas parcels are indicated by green dotted ellipses in the subfigures. Panels a) and d) show that the asymmetric line profiles emerging in the disk when seen normal to its semimajor axis. Panel c) shows that the symmetric line profiles emerging in the disk when seen parallel to its semimajor axis. Panel b) shows that the line profiles with a smaller amount of asymmetry emerging from a disk with intermediate position angle.