HCN(3−2) line profile (average of 12.1 to 16.2 November 2021) with a simulation superimposed in blue. The vertical axis is the main beam brightness temperature in kelvins, and the horizontal axis is the Doppler velocity in the rest frame of the comet. The inset to the upper right depicts the outgassing pattern used to model the line: Q_HCN = 0.9 × 10²⁵ molec s⁻¹ in a π sr (half of the hemisphere on the Earth side) jet at 0.86 km s⁻¹ and Q_HCN = 0.2 × 10²⁵ molec s⁻¹ at 0.54 km s⁻¹ in the remaining 3π sr.