Cooling or deexcitation rate coefficients for H₂ colliding with H at a gas temperature of 300 K. Plotted are the overall rates from a given v,J upper level to the 0,0 or 0,1 ground state, based on the fastest possible rovibrational cascade (see text). The rates are grouped by vibrational level: v,J = 0,0 to 0,17 (black circles), 1,0 to 1,14 (orange squares), 2,0 to 2,11 (blue triangles) and 3,0 to 3,8 (green diamonds). The original state-to-state rates are from Lique (2015). The gray star marks the adopted rate for our v^* = 6 pseudo-level; as indicated by the arrow, this is the average from the v = 3 rates.