Colour-colour diagrams, (g – r) vs. (r − i) vs. (i – z_s), of the 155 objects with known spectral classification, used to classify 2023 DZ₂ based on the TCS/MusSCAT2 data. The taxonomic types defined in the DeMeo et al. (2009) system are divided into three major composition groups: the Q/S-complex (green and blue dots), the C-complex (black dots), and the X-complex (grey dots). In addition, three end-member types are considered: A-, D-, and V-type.