Map of the area around Sh2-284. Left: one square degree centred on the nominal position for Dolidze 25 in SIMBAD from the DSS2 red plate with the stars observed identified. Likely cluster members are indicated with their WEBDA numbers and marked in blue. They are described in Sect. 3.1. Emission line stars are shown in red. Clearly foreground stars are marked in green. Other stars at (approximately) the same distance as the cluster are marked in magenta. Right: the same area (the centre is displaced by about 2′ to the north and to the west) as seen by WISE in the W3 filter (12 μm), which traces almost exclusively dust emission. The positions of all the stars in the left panel are marked with the same symbols. In both images north is up and east is left.