Predicted magnitudes and positional errors of matched and unmatched SkyBoT SSOs: the blue dots show the magnitude over the positional uncertainty as given by SkyBoT for SSOs that were cross-matched with a KiDS SSO. The red dots show SkyBoT SSOs that were not found. The gray, dashed line indicates the 10′′ cross-matching radius. Not shown are objects with positional errors smaller than 0.1′′. The column pattern in the data is caused by the limited resolution of the SkyBoT magnitude prediction.