pub const ASHBY_LM_NUM: i128 = 648_378;Expand description
Ashby & Patla (2024) mean surface-to-surface rate (L_M = 6.48378\times 10^{-10}) ((\mathrm{d}\tau_m/\mathrm{d}\tau_e - 1)).
Informational: expected mean dLTC/dTT − 1 ≈ L_D^M − L_m ≈ L_M.
Not used directly in the conversion (LTC is derived from TCL via LM_NUM).