High spectral resolution observations of Uranus' near-IR thermospheric $H_2$ emission spectrum using the IGRINS spectrograph during the 2018 and 2023 apparition

Laurence Trafton, Kyle Kaplan

Ground-based near-IR observations have revealed that Uranus anomalously hot upper atmosphere, detected by Voyager 2, has been steadily cooling. The observed $H_3^{+}$ and $H_2$ emiss…