Serendipitous detection of asteroid (234) Barbara in XMM-Newton observation 078104010 on 2016-08-27 22:03:30, captured by the OM camera, at the time observing sequentially with 4 out of 7 available filters. The object remains in the FoV for the entire duration of the observation, only visible at U (left) and UVW1 (right) filters (344 nm and 291 nm effective wavelength, respectively). The green and red circles represent the position of Barbara at the start time and stop time of the observation, respectively.