Comparison of the intensity of the ~16.3 μm and ~24 μm crystalline olivine emissivity features after removing the continuum from the spectra of 1999 OX3 (red, cliff type; Pinilla-Alonso et al. 2025), 2013 LU28 (less red, bowl type; Pinilla-Alonso et al. 2025), and the comae of comet Hale-Bopp (Crovisier et al. 1997; Kelley et al. 2017). For 1999 OX3 and 2013 LU28, we applied a Savitzky-Golay smoothing algorithm with a 0.3 μm window. In the case of 1999 OX3, we did not consider data between 23.7 and 24 μm because the noise is strong in this wavelength region.