Isometric projection of the best-fit infalling trajectory (thick black line) and associated uncertainties (thin gray lines) for the streamer, as discussed in Section 3.1, in 3D position–position–position space (RA, decl., and LOS distance). The blue disk and red cone represent the protoplanetary disk and its angular momentum orientation, respectively, as discussed in Section 3.3. An interactive version of this figure is available online, allowing rotation and zooming of the 3D structures. In addition, the symbol key in the upper left can be clicked to turn these structures on or off in the interactive figure.

An interactive version of this figure is available in the online article.

An interactive version of this figure is available.

An interactive version of this figure is available in the online journal.