Orbital motion of HV Tau B with respect to HV Tau A, whose position is indicated by the diamond. The 1994 and 1996 points reflect astrometric measurements by Simon et al. (1996) and Monin & Bouvier (2000), whereas the other two points are our 2002 and 2004 measurements (see the text). The insets represent our H and L′ images after a light Lucy deconvolution (25 and 50 iterations, respectively). While deconvolution better highlights the fact that the tight binary is resolved in our data, relative astrometry and photometry information for all our images was extracted by PSF-fitting of the original images.