Fig. 4

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Pressure evolution of Pluto over a 248-yr heliocentric orbital period predicted by the VTM19, along with the measured pressures with 1σ error bars. The 3σ error bars of our new measurements and of the previous measurements of the 19 July 2016, 17 July 2019, and 6 June 2020 events are also presented using the published χ2 maps. denotes the albedo of nitrogen ice.
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