Identification of emissivity features and positions in the spectrum of 2013 LU28 and comparison with amorphous and crystalline olivine and pyroxene (enstatite) emissivity spectra. The synthetic emissivity spectra of silicates were computed following the procedure described by Vernazza et al. (2015); Marsset et al. (2016) and using the optical constants of Koike et al. (2006) for crystalline olivine, those of Rucks et al. (2022) for crystalline pyroxene (enstatite), and those of Dorschner et al. (1995) for amorphous olivine and pyroxene.