Emissivity spectrum of (515) Athalia, compared to those of (65) Cybele and Trojan asteroid (624) Hektor (shifted in the emissivity axis for clarity). Notice the emission plateau due to fine-grained silicates in the spectra of the three asteroids. Also note that the contrast is smaller (~3–4%) in the spectrum of (515) Athalia than in that of (65) Cybele (~ 5%) and in that of Hektor (~15%).