Encyclopedia Astronautica
Juno


NASA Jupiter polar orbiter with the mission of studying the planet's composition, gravity field, magnetic field, and polar magnetosphere. Launched 2011.08.05, the planned 33-orbit mission at Jupiter was to last from arrival on 2016.07.04 to termination with braking of the spacecraft to burn up in the Jovian atmosphere in October 2017. First NASA outer planet mission to use solar panels (3 x 2.7 m x 8.9 m).

Development, launch, and operation of the 3625 kg spacecraft cost a total of $1.1 billion. Instrumentation suite included:

  • MWR - Microwave radiometer - to probe the deep atmosphere of Jupiter at radio wavelengths from 1.3 cm to 50 cm using six separate radiometers
  • JIRAM - Jovian Infrared Auroral Mapper - to study the upper layers of Jupiter's atmosphere at infrared wavelengths in the 25 m interval using an imager and a spectrometer.
  • FGM - Fluxgate Magnetometer - to map Jupiter's magnetic field, determine the dynamics of Jupiter's interior and the three-dimensional structure of the polar magnetosphere.
  • ASC - Advanced Stellar Compass - to provide accurate pointing information of the Juno spacecraft for precise mapping.
  • JADE - Jovian Auroral Distribution Experiment - to resolve the plasma structure of the Jovian aurora by measuring the distributions of particles in the polar magnetosphere of Jupiter.
  • JEDI - Jovian Energetic Particle Detector Instrument - to measure the energy and angular distribution of ions in the polar magnetosphere of Jupiter.
  • WAVES - Radio and Plasma Wave Sensor - to identify the regions of auroral currents that define Jovian radio emissions.
  • UVS - Ultraviolet Imaging Spectrograph - to provide spectral images of the UV auroral emissions in the polar magnetosphere.
  • JCM - JunoCam - a visible light camera/telescope, included for publicity purposes to take images of the planet. Expected to only operate during the first seven orbits of Jupiter before being knocked out by the planet's damaging radiation and magnetic fields.

First Launch: 2011.08.05.
Last Launch: 2011.08.05.
Number: 1 .

More... - Chronology...

Juno Chronology


2011 August 5 - . 16:25 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC41. Launch Pad: SLC41. LV Family: Atlas V. Launch Vehicle: Atlas V 551.
  • Juno - . Nation: USA. Class: Outer planets. Type: Outer planets probe. Spacecraft: Juno. USAF Sat Cat: 37773 . COSPAR: 2011-040A. Accelerated by the AV-029 Centaur to a hyperbolic escape orbit at 17:15 GMT into a 1.0 AU x 2.26 AU x 0.1 deg solar orbit. A 500-km flyby of Earth on 9 October 2013 will pump this orbit towards Jupiter. It is planned to enter Jovian orbit in July 2016, and be commaned to bun up in Jupiter's atmosphere in October 2017. Payloads included magnetometers, plasma and particle instruments, UV auroral imagers and spectrometers, and the JunoCam imager. The probe has a mass of 1593 kg and carries a further 2032 kg of propellant. Its three large solar arrays span around 22 meters; it is the first spacecraft to fly to the outer solar system without radioisotope power sources.

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