Peaks of the CH₃CN(12–11) K = 2, 3, 4, 5, 7, 8 components in the different velocity channels overlaid on the best-fit model of a disk undergoing Keplerian rotation and radial infall (see text). The data have been rotated counterclockwise by 42° to align the disk with the X-axis. The offsets are relative to the disk center. The color indicates the velocity along the line of sight relative to the star. The black cross marks the position of the 1.4 mm continuum peak.