The Juno New Frontiers Jupiter Polar Orbiter Mission

Details The Juno New Frontiers Jupiter Polar Orbiter Mission The Juno New Frontiers Jupiter Polar Orbiter Mission

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufm.p51b1435t&link_type=abstract

American Geophysical Union, Fall Meeting 2004, abstract #P51B-1435

Other

6220 Jupiter, 1227 Planetary Geodesy And Gravity (5420, 5714, 6019), 0300 Atmospheric Composition And Structure, 0343 Planetary Atmospheres (5405, 5407, 5409, 5704, 5705, 5707)

Scientific paper

The Juno mission is currently in Phase A Concept Study as a candidate for the next NASA New Frontiers program investigation. The overarching scientific goal of the Juno mission is to understand the origin and evolution of Jupiter. As the archetype of giant planets, Jupiter can provide the knowledge we need to understand the origin of our own solar system and the planetary systems being discovered around other stars. Juno's investigation of Jupiter focuses on four themes: Origin, Interior Structure, Atmospheric Composition and Dynamics, and the Polar Magnetosphere. The mission is a Jupiter polar orbiter which uses a spinning spacecraft to make global maps of the gravity, magnetic fields, and atmospheric composition of Jupiter from a unique polar orbit with a close perijove. Juno's 32 orbits extensively sample Jupiter's full range of latitudes and longitudes. High sensitivity radiometric measurements thus yield a 3-dimensional view of Jupiter's deep atmosphere (down to ~100bars) to infer the bulk abundance of water, which could not be derived from Galileo data, and understand its complex meteorology. Determining water abundance permits discrimination between various scenarios of the formation of Jupiter. The radiometry will also confirm the global ammonia abundance. The gravity data constrain the planet's interior rotation and structure. The precise magnetic field measurements are used to infer how the interior dynamo works and generates the most powerful magnetic field of planets in the Solar System. From its polar perspective Juno combines in situ and remote sensing observations to explore the polar magnetosphere and determine what drives Jupiter's remarkable auroras. Without landers, probes, or returned samples, the mission has extremely low risk. The JPL contribution to this paper was performed at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.

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