K-band infrared image from the 2 MASS survey, centered at IRAS 19508+2659. The red cross marks the position of the radio continuum source reported by White et al. (2005), but that we argue it actually corresponds to OH maser emission (Sect. 4.2.5). The black cross is at the position of the SiO maser emission in our data. The blue circle is centered at the optical source Gaia DR3 4056748416698878592. Coordinates are in the equatorial (J2000) system.