Spitzer 24μm image toward HD 34078, from (France et al. 2007). Contours are equally spaced every 50 MJy / sr, starting from 100 MJy / sr. Offsets are measured from the star position, displayed as a black star. The red arrow represents the star on-sky proper motion for the next 1000 years. The solid open white curve displays a parabola pointing in this direction, with its focus at the star and a projected star-apex distance R_obs = 15′′ (see Appendix A for a description of projection effects in a paraboloid). The two dashed curves correspond to variations of R_obs by ± 5″. The closed white contour corresponds to the region mapped with the PdBI interferometer. The right ascension axis increases toward the left.