Relative reflectances of Pluto corresponding to hemispheres centered on six different sub-Earth longitudes. All the reflectances are normalized at 0.60 μm and shifted by 0.15 in relative reflectance for clarity. The labels are ordered (top to bottom) in the same order as the reflectances. The vertical dashed lines show the telluric absorptions. Some of these telluric absorptions have not been completely removed. The absorption at 0.52 μm is an artifact and is present on the spectra of the solar analogs. Its center corresponds to the magnesium triplet (0.5169–0. 5183 μm) that is present in G stars.