Left: measured VLBA sky positions of V838 Mon maser spots in two contiguous channels (black and red squares). The line corresponds to the best fit to the data while the filled circles are the expected positions from this fit at the observed epochs. Rigth: right ascension (upper panel) and declination (lower panel) of the maser spots as a function of time after subtracting the fit proper motions to see only the effect of the parallax.