Comparison of composite images of the dark cloud Dobashi 3782 and a contained HHO. Top: composite image (epoch 2007) based on I, Hα, and [SII] frames taken with the Tautenburg Schmidt telescope. It hosts the YSO IRAS 01166+6635, marked by the circle, which drives a jet that excites a compact HHO south of it (centre). It appears greenish-blue in this representation because of its strong Hα emission. Bottom: IGAPS composite image (epoch 2013), based on i, Hα, and r_I frames. The YSO, as well as the HHO, appears green because it is not clearly detected in either r_I or i. The HHO is just resolved at no more than 2 arcsec across.