Juno Update for OPAG. Steve Levin Juno Project Scien8st September 7, 2017
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1 Juno Update for OPAG Steve Levin Juno Project Scien8st September 7, 2017
2 Juno Mission Overview Salient Features: First solar-powered mission to Jupiter Eight science instruments to conduct gravity, magnetic and atmospheric investigations, plus a camera for education and public outreach Spinning, polar orbiter spacecraft launched on August 5, 2011, arrived July 4, 2016 Elliptical 53-day orbit swings below radiation belts to minimize radiation exposure 2 nd mission in NASA s New Frontiers Program Science Objective: Improve our understanding of giant planet formation and evolution by studying Jupiter s origin, interior structure, atmospheric composition and dynamics, and magnetosphere Principal Investigator: Scott Bolton Southwest Research Institute
3 Juno Science Juno Science Objectives Origin Determine the abundance of water and place an upper limit on the mass of Jupiter s dense core to decide which theory of the planet s origin is correct Interior Understand Jupiter s interior structure and how material moves deep within the planet by mapping its gravitational and magnetic fields Atmosphere Map variations in atmospheric composition, temperature, cloud opacity and dynamics to depths greater than 100 bars at all latitudes Magnetosphere Characterize and explore the threedimensional structure of Jupiter's polar magnetosphere and auroras. Juno Instruments **** Gravity Science (JPL, ASI) **** Magnetometer MAG (GSFC) **** Microwave Radiometer MWR (JPL) **** Jupiter Energetic Particle Detector JEDI (APL) **** Jovian Auroral Distributions Exp. JADE (SwRI) **** Plasma Waves Instrument Waves (U of Iowa) **** UV Spectrometer UVS (SwRI) **** Infrared Camera JIRAM (ASI) **** Visible Camera JunoCam (Malin)
4 Juno at Jupiter PJ0 July 4: Orbit insertion went perfectly! PJ1 August 27: First perijove pass with instruments on. PJ2 October 19: No Period Reduction Maneuver. (Staying in 53-day orbits.) PJ3 December 11: First Gravity Science orbit. PJ4 February 2: MWR orientation. PJ5 March 27: MWT-tilt orientation. PJ6 May 19: Gravity Science orientation. PJ7 July 11: MWR orientation, Great Red Spot. PJ8 September 1: Gravity Science orientation. PJ9 October 24: MWR-tilt orientation, Solar conjunction. PJ10 PJ36: Every 53 days, End of Primary Science Phase E, 32 orbit mapping complete, plus two spares. The technical data in this document is controlled under the U.S. Export Regulations; release to foreign persons may require an export 4
5 Juno spacecrac status Juno is in orbit at Jupiter, collecting great data! The spacecraft is working well. No known technical issues completing full mission. Eclipse avoidance maneuver in 2019 Slight decrease in total radiation dose Progression of orbital plane due to longer duration Budget review for longer orbits scheduled for October. The technical data in this document is controlled under the U.S. Export Regulations; release to foreign persons may require an export 5
6 Juno science status All instruments are working well. No evidence of radiation damage. We are collecting great data with every perijove pass. Lots of interesting surprises! The technical data in this document is controlled under the U.S. Export Regulations; release to foreign persons may require an export 6
7 50+ Publica8ons in the first year... Jupiter s interior and deep atmosphere: the first close polar pass with the Juno spacecraft, S.J. Bolton et al., Science, 356 (6340), : / science.aal2108 Jupiter s Magnetosphere and Aurorae Observed by the Juno Spacecraft During Its First Polar Orbits, J.E.P. Connerney et al., Science, 356 (6340), :, doi: /science.aal5928 GRL special issue Discrete and broadband electron acceleration in Jupiter s powerful aurora, B.H. Mauk, et al., Nature doi: /nature23648 (today)...and many more in progress. Juno presentations at AOGS and EPSC. Four Juno special talks at DPS (Interiors, Deep Atmosphere, Aurora, Citizen Science). Juno sessions planned for AGU. 7
8
9 hlp://missionjuno.swri.edu
10 hlp://missionjuno.swri.edu
11 This Is The New Jupiter Deep Atmosphere Shows Drama8cally More Structure Than Previously Imagined Top of cloud layer Depleted ammonia è Galileo Probe Depth Concentration of ammonia feeding up through Jupiter s equator 11
12 This Is The New Jupiter Jovian Magne8c Field Is Drama8cally More Complex (Spa8ally variable) Than Expected 12
13 More Science To Come Global Water Abundance (from MWR data) will shed light on origin of solar systems Magne8c Mapping will characterize planetary dynamo Large 53-day orbit, progression in local 8me will enable magnetospheric explora8on Precision gravity science passes, progression of line of sight will enable precession of spin axis, characteriza8on of Jovian core Great Red Spot flyover was July 11 Perijove moves north about 1 degree each orbit 13
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