Cross-match with the photometric UCD candidates from the Dark Energy Survey (dal Ponte et al. 2023). We found 125 objects in common. Left: Relation between I_E and I_DES. It is used to translate the DES data onto the Euclid scale and compare the magnitude distributions. Because DES covers about 100 times larger area of the sky than Q1 (EDF-N is not covered), the objects shared between the two surveys tend to fall within the magnitude range where most of the overall objects are found – between magnitudes 22 and 25. Right: A correlation between the Y_E − H_E and J_VHS VIKING − K_{s, VHS VIKING} colours (available in the dal Ponte et al. 2023 catalogue). A tight relation supports a reliable cross-match. More than 60% of them were spectroscopically classified into C1 and C2 groups (black circles), and 25% have a spectral type determined.