Hubble Space Telescope observations of Jupiter’s FUV auroras during the Juno Extended Mission

We present Hubble Space Telescope observations of Jupiter’s far-ultraviolet auroras obtained as part of a programme of observations covering 3 years of Juno’s Extended Mission, GO-16675. The observations obtained to date were scheduled near to PJs 37 (October 2021), 38 (November 2021) and 42 (May 2022). The aim of the observations presented is to compare the auroral emissions with in situ Juno measurements in the equatorial middle magnetosphere region inside ∼30 RJ. Of particular
interest are comparison of equatorward diffuse emission with electron populations near Europa, and of the main emission intensity and latitude with plasma and magnetic field data in the middle magnetosphere. The latter will shed light on the relation between the main auroral emission and magnetosphere-ionosphere coupling currents, and radial force balance in the magnetosphere. In this presentation we discuss the preliminary results from the observations obtained to date.