Juno

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Science ExplorationinterplanetaryCOSPAR 2011-040ALaunched 8/5/2011

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Mission & Launch

Launch Mission: Juno Mission
Launch Vehicle: Atlas V 551
Launch Date: 8/5/2011

Orbit & Mass

Orbit Class: interplanetary
Altitude: -19,194 km
Inclination: 28.91 deg
Dry Mass: 1,593 kg
Total Mass: 3,625 kg

Payload Classification

Organizations

Operator: NASA Jet Propulsion Laboratory
Manufacturer: Lockheed Martin

Registry

COSPAR ID: 2011-040A
UN Registration: ST/SG/SER.E/632

Mentions

All verified mentions of this spacecraft in source documents.

The JUNO project utilizes a 35.4-meter-diameter transparent sphere filled with 20,000 tonnes of liquid scintillator, buried 700 meters underground.

CapabilityValue 5.0Sep 20, 2025JUNO begins decade-long mission to probe neutrino mysteries

The JUNO collaboration unites 700 researchers.

General

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The primary scientific goal of JUNO is to measure neutrino oscillations with unprecedented precision, particularly their transformation frequencies.

CapabilityGeneralValue 3.0Sep 20, 2025JUNO begins decade-long mission to probe neutrino mysteries

Juno and Tyche form part of the Ministry of Defence’s space-based ISR programme that will deliver a constellation of satellites and supporting ground systems by 2031.

PlanValue 3.5Nov 5, 2024Juno satellite to be built by SSTL for the UK’s MOD DE&S for advanced military ops

The Ministry of Defence’s Defence Equipment & Support (DE&S) procured a £40 million contract with Surrey Satellite Technology Ltd. (SSTL) to develop the satellite Juno.

RelationshipsFinancialCapabilityValue 4.6Nov 5, 2024Juno satellite to be built by SSTL for the UK’s MOD DE&S for advanced military ops

Juno will perform a second ultra-close flyby of Io on 2024-02-03 coming within about 1497 km (1,500 km) of the surface.

PlanCapabilityValue 4.5Dec 28, 2023NASA’s Juno Spacecraft to Get Close Look at Jupiter’s Volcanic Moon Io on Dec 30

The spinning, solar-powered Juno spacecraft was launched in 2011 and has been studying the Jovian system since 2016.

CapabilityGeneralValue 3.5Jul 28, 2023NASA’s Juno Spacecraft to Make its Closest Approach to Jupiter’s Moon Io

Lockheed Martin Space in Denver built and operates the Juno spacecraft.

CapabilityGeneralValue 4.0Jul 28, 2023NASA’s Juno Spacecraft to Make its Closest Approach to Jupiter’s Moon Io

At the time the raw image was taken, Juno was about 19,1448 km (32,0 m) above Jupiter’s cloud tops.

CapabilityValue 1.8Jun 18, 2023NASA’s Juno Mission captures lightning on Jupiter

Spire's neural network with JUNO compares weather predictions with measurements to rank each model’s results.

CapabilityGeneralValue 3.2May 20, 2021Spire Expands Machine Learning and AI Efforts to Improve Predictive Data Capabilities

Spire uses a machine learning program called JUNO to boost ensemble weather forecasting by combining the results of multiple models into one prediction.

CapabilityGeneralValue 3.5May 20, 2021Spire Expands Machine Learning and AI Efforts to Improve Predictive Data Capabilities

Juno's main engine was designed to change the spacecraft's orbit from a 53-day period to a 14-day period but was not used for that maneuver.

CapabilityValue 4.0Sep 9, 2020NASA’s Juno spacecraft seeking extended mission at Jupiter

Juno’s X-band and Ka-band transmissions provide information on spacecraft velocity through observable Doppler shifts.

CapabilityGeneralValue 4.0Nov 20, 2019China quietly used NASA’s Jupiter probe to test its deep space network

China used the 35-meter-diameter dish at Kashi station in Xinjiang to track Juno.

CapabilityGeneralValue 4.0Nov 20, 2019China quietly used NASA’s Jupiter probe to test its deep space network