4. The Dwarf Planets in Comparison Name Diameter relative to Luna Mass relative to Luna Density (Kg/m 3 ) Temperature (K) Orbital period (yrs) Ceres 28% 1.3% 2080 167 4.6 Pluto 69% 17.8% 2000 44 248 Haumea 33% 5.7% 2600-3300 32 285 Makemake 43% ~5%? ~2000? ~30 309 Eris 78% 22.7% 2300 42 557