Example matches of asteroids and meteorites. The asteroid spectra (black, solid) have been divided by the exponential alteration-model fitted to the ratio of the asteroid and meteorite spectrum. The similarity Φ between the asteroid spectra and the meteorite spectra (red) does not account for wavelengths below 0.7 μm (vertical, dotted line). The light grey and thick black lines show the spectra before and after smoothing, respectively. The given asteroid classes are from Mahlke et al. (2022). The spectrum of (234) Barbara is the one from DeMeo et al. (2009).