Upper panel: B − V versus V − R colours of 2012 DR₃₀ and those of the objects in the “MBOSS2” database (Hainaut et al. 2012). The symbols correspond to various dynamical classes of the TNO population and of comets, as follows: (1) red filled triangle: plutions; (2) open red triangle: other resonant objects; (3) filled red circle: cold Classicals; (4) filled orange square: hot Classicals; (5) filled yellow square: other Classicals; (6) filled dark blue circle: scattered disk objects; (7) filled light blue circle: detached objects; (8) open light blue triangle: Jupiter Trojans; (9) filled green circle: Centaurs; (10) filled black square: short period comets; (11) open black square: long peroid comets. The big black open circle represents the solar colours (Ramírez et al. 2012). Lower panel: the same as the upper panel, but now presenting the B − V versus R − I colours of 2012 DR₃₀ and the objects in the “MBOSS2” database.