CO production rates as a function of ∆- and phase-corrected red nuclear magnitude m_R(1, r_h, 0). Purple symbols show CO data from this work. Green symbols show CO data from Wierzchos & Womack (2020). The dashed blue line shows the fit to all data (Eq. (2)). The dotted red line shows the curve log₁₀(Q(CO)) = K −0.22 m_R(1, r_h, 0), whose regression slope corresponds to that measured for comet Hale-Bopp (K here is an arbitrary constant and not the constant appearing in the Hale-Bopp correlation equation Eq. (B.4)).