Surface brightness maps of field G109.81+02.72, part of the Cepheus MC, in PACS 70 μm (a), SPIRE 250 μm (b), Planck 857 GHz (∼350 μm) (c), and SCUBA-2 850 μm (d). SCUBA-2 data are represented in units of mJy arcsec⁻², all others are in MJy sr⁻¹. The Planck image is 1 × 1 degrees in size. All other images cover a smaller area of 0.2 × 0.2 degrees, as indicated by the rectangle drawn on the Planck image. The beam is shown in the lower left corner of each frame.