Comparison between observed water-production rates and the water production estimated from the optical scattering cross section. The black points show the model for a = 10 μm, f_C = 0.1%, and an assumed icy-grain albedo p_ice = 0.5. Colored symbols show observed H₂O production rates, with OH-based values shown as proxies where applicable (N. Biver et al. 2026; M. Belyakov et al. 2026; D. Bockelee-Morvan et al. 2026; M. Combi et al. 2026; C. M. Lisse et al. 2026; N. X. Roth et al. 2026; L. E. Salazar Manzano et al. 2026; H. Tan et al. 2026).