Schematic view of the equatorial X–Y plane of a four-arm spiral barred galaxy in the adopted reference frame. The main perturbation components, such as the spiral arms, the central bar, and the bulge, were calculated using the parameter’s values from Table 1, except for the pitch angle i = +14.° The position of the Sun is shown by a blue cross. The bar’s phase with respect to the reference direction (X-axis) is 67.°5 (or 22.°5 with respect to the Sun). Close to the Sun, Sagittarius and Perseus arms are identified.