Jupiter as an Exoplanet: Insights from Cassini Phase Curves

Due to its proximity Earth, Jupiter of the Solar System serves as a unique case study for gas-giant exoplanets. In current study, we perform fits ab initio, reflective, semi-infinite, homogeneous model atmospheres 61 phase curves from 0.40 1.00 $\mu$m, obtained Cassini spacecraft, within Bayesian framework. We reproduce previous finding that atmospheric models using classic reflection laws (Lambertian, Rayleigh, single Henyey-Greenstein) provide poor data. Using double Henyey-Greenstein law, extract posterior distributions single-scattering albedo and scattering asymmetry factors tabulate their median values uncertainties. infer aerosols in Jovian atmosphere are large, irregular, polydisperse particles produce strong forward together with narrow backscattering lobe. The near-unity albedos imply multiple radiation is an important effect. speculate observed lobe caused by coherent radiation, which usually associated bodies solid surfaces regolith. Our findings demonstrate precise, multi-wavelength encode valuable information on fundamental properties cloud/haze particles. method described this Letter enables be retrieved James Webb Space Telescope