Upper panel: spectra of Orcus in the H and K bands from this work (top) and Barucci et al. (2008b) (middle). The bottom spectrum is an average of the two. The spectra are normalized to 1.0 at 1.75 μm and are shifted by +0.65, 0, and −0.4. The spectrum taken in March 2010 was significantly noisier than the two shown here so we neither plot it nor use it in our analysis. Lower panel: the ratio of the Barucci et al. data to data from this work, which shows little difference between the spectra apart from a small flux difference shortward of 1.65 μm.