LIRIS false-colour image of Sh2-152 (blue = J, green = H, red = K_S); marked with green squares, the stars observed spectroscopically in the near-infrared. In the centre, indicated by a red circle, the central star observed spectroscopically in visual. The positions of the masers within the field are indicated by yellow crosses. The (orange) ellipses correspond to the 1-σ position uncertainties for the IRAS 22566+5830 (central) and IRAS 22566+5828 (lower) sources. Black and white colours for central stars are used for visibility reasons.