Komposisi kimia permukaan asteroid tipe D mungkin mirip dengan satelit Kalisto,[2] sehingga permukaannya terdiri dari materi-materi berkarbon.
Rujukan
↑William B. McKinnon, 2008, "On The Possibility Of Large KBOs Being Injected Into The Outer Asteroid Belt". American Astronomical Society, DPS meeting #40, #38.03
↑R. Greeley, J. E. Klemaszewski, L. Wagner et al., «Galileo views of the geology of Callisto», Planetary and Space Science, vol. 48, 2000, hal. 829–853.
