Simultaneous Multi-Wavelength Observations of the Northern Polar Region of Uranus

Disk-resolved observations of planetary atmospheres across large wavelength ranges constrain gas abundances over longitude, latitude, and pressure, allowing for the characterization of the vertical structure of the atmosphere and the impact of atmospheric dynamics. In this presentation, we investigate the optical and near-infrared reflectance of Uranus observed simultaneously with emission at radio wavelengths. Probing the atmospheric dynamics of Uranus allows for the characterization of planetary atmospheres' response to extreme obliquity. We present longitudinally averaged profiles of I/F of Uranus extracted from photometry observed by the Hubble Space Telescope WFC3 UVIS and Keck II NIRC2 on August 29th and 30th of 2015. Preliminary analysis shows that the latitude variations of I/F are consistent with a lower methane abundance in the northern polar region in comparison to equatorial latitudes, in agreement with previous works (e.g. Sromovsky et al. 2019). We will compare our results with simultaneous VLA observations, which probe down to ~50 bars (from Molter et al., 2019).