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On 6 Jun 2020, Pluto's stellar occultation was successfully observed at aground-based observatory and Pluto's atmospheric parameters were investigated.We used an atmospheric model of Pluto (DO15), assuming a spherical andtransparent pure N2 atmosphere. Using ray-tracing code the stellar occultationlight curve was satisfactorily fitted to this model. We found that Pluto'satmospheric pressure at the reference radius of 1215 km is 6.72+_0.21 {\mu}bar.Our estimated pressure shows a continuation of the increasing pressure studiedin 2016 consistent with a seasonal volatile transport model. We concluded thatthe N2 condensation processes in the Sputnik Planitia glacier are increasingdue to the heating of the N2 ice in this basin. This study's result was shownon the diagram of the annual evolution of atmospheric pressure.

Study of Pluto's Atmosphere Based on 2020 Stellar Occultation Light Curve Results