Ld-type is a new class and has more extreme spectral features than the L-type asteroid. class of O-type asteroids has since only been assigned to the asteroid 3628 Božněmcová.A significant number of small asteroids were found to fall in the Q, R, and V types, which were represented by only a single body in the Tholen scheme. في مخطط Bus و Binzel SMASS تم تعيين نوع واحد فقط لأي كويكب معين. السؤال: ما الذي يميز الكويكب من نوع Ld عن الكويكب من نوع L؟
Ld-type هو فئة جديدة و ليها ميزات طيفية أكتر تطرف