Position-velocity diagram of the ALMA C¹⁸O datacube, centered at the position of the protostar, with a PA of 157°.1 and a width of 0″.4. The black curves show the Keplerian rotation profile produced by three protostellar massses: the dotted line shows the Keplerian curve for a protostar of 0.1 M_⊙ (Brassfield & Bourke 2011), the dashed line for 0.2 M_⊙, and the dash-dotted line for 0.3 M_⊙. The dotted horizontal line marks the protostar’s v_lsr = 10.2 km s⁻¹. The scalebar represents one beam width (120 au or 0″.4)