Fig. 8

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Time evolution of comet C/2021 A1 (Leonard), single days, and averages of selected periods in November-December 2021. The OH production rates from the NRT are plotted in black. The daily water production rates inferred from SOHO/SWAN observations of the wide H Lyman-α coma, which tends to smooth out short term variations, are plotted in red. (Combi et al. 2023a).
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