NIR color–magnitude diagram comparing the TMR-1 components and other variable sources with the Class I (red), Class II (blue), and Class III (grey) sources in Taurus. The protostellar sources with face-on (<50°) and edge-on (>50°) inclinations are marked by black open squares and grey triangles, respectively. Also plotted are 2011 colors for the two groups seen in Fig. 4, based on the proper motions; asterisks represent group A with μ_α > 0, filled diamonds group B with μ_α < 0.