Vertical structure of visible wavelength limb emissions on Jupiter’s night side

In 2024, the orbital evolution of Juno’s Extended Mission created opportunities for Stellar Reference Unit (SRU) limb observations at high northern latitudes on Jupiter’s night side. The night side measurements were acquired during the period of spacecraft closest approach, from only a few thousand kilometers from the cloud tops. The low-light SRU is a highly sensitive broadband visible wavelength (450-1000 nm) star camera, with a peak sensitivity from ~570-800 nm, that Juno has utilized as a multi-disciplinary science imager. The night side SRU limb imagery provides high-resolution views of the vertical structure of visible wavelength emission layers (and potential photon scattering layers) in Jupiter’s atmosphere between ~100-1300 km above the 1 bar level. Observations made in high northern latitude regions, both inside and outside the auroral region, are compared to those made in the equatorial region. Our presentation will discuss findings and potential interpretations of this unprecedented data set.