Comparison of the emissivity spectrum of 2013 LU28 with that of the Tagish Lake meteorite. Aqueously altered matrix-rich carbonaceous chondrites such as Tagish Lake and Orgueil (e.g. Sandford 1984; Vernazza et al. 2012; Beck et al. 2014; Izawa et al. 2021) exhibit prominent emissivity features centred at ~10 μm and ~22 μm similar to those observed in aqueously altered chondritic smooth IDP spectra (Sandford & Walker 1985). However, these features are very different from those observed in primitive bodies, as shown in this figure.