Normalized reflectance vs. wavelength. The spectra were shifted in flux for better visualization. The region close to 1.85 μm was masked due to the absorptions of the atmosphere. In green the spectrum of Charon, in blue Haumea, in red 2005 RR₄₃, in purple Orcus, and in brown, Quaoar. There is a coincidence of the band at 1.65 and 2 μm in all spectra of TNOs, which are signatures of the water ice in these objects.