Map of YSO groups (star symbols) and masers (magenta circles) in heliocentric coordinates. Right panel: zoomed-in view; it should be noted that the Sun is off the left side of both plots. Groups associated with the structure are highlighted in yellow, while others are in black. The spiral-arm centers defined by Reid et al. (2019) are indicated by the gray bands. The red line indicates the major axis of the feature identified here, with its 56° pitch angle illustrated in blue.