Fig. 4: Reflectance spectra of Murchison affected by porosity and surface condition.
From: Space weathering acts strongly on the uppermost surface of Ryugu

The Vis-NIR-MIR (a), Vis (b), and NIR (c) spectra of the Tap-0, 10, 20, and 40, Scraped, Light-Airfall, and Heavier-Airfall Murchison samples.