Velocity of the maser spots in G24.790+00.083 north (top) and south (bottom) versus azimuth angle measured from the major axis (north to east). Circles represent the data, while the lines represent the best kinematical models of rotating and expanding disks with infintesimal thickness, as described in Sect. 4.3. The main parameters of the fit are listed in the figures. The N, E, S, and W directions are also indicated for clarity.