  We present the first estimation of the energy cascade rate in Jupiter's
magnetosheath (MS). We use in-situ observations from the Jovian Auroral
Distributions Experiment (JADE) and the magnetometer investigation (MAG)
instruments onboard the Juno spacecraft, in concert with two recent
compressible models to investigate the cascade rate in the magnetohydrodynamic
(MHD) scales. While a high level of compressible density fluctuations is
observed in the Jovian MS, a constant energy flux exists in the MHD inertial
range. The compressible isothermal and polytropic energy cascade rates increase
in the MHD range when density fluctuations are present. We find that the energy
cascade rate in Jupiter's magnetosheath is at least two orders of magnitude
(100 times) smaller than the corresponding typical value in the Earth's
magnetosheath.
