Artist's rendering of the Juno spacecraft | |
| Mission type | Jupiter orbiter |
|---|---|
| Operator | NASA / JPL |
| COSPAR ID | 2011-040A |
| SATCAT no. | 37773 |
| Website |
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| Mission duration | Planned: 7 years Elapsed: 15 years, 3 months, 2 days Cruise: 4 years, 10 months, 29 days Science phase: 4 years (extended until September 2025) |
| Spacecraft properties | |
| Manufacturer | Lockheed Martin |
| Launch mass | 3,625 kg (7,992 lb) |
| Dry mass | 1,593 kg (3,512 lb) |
| Dimensions | 20.1 × 4.6 m (66 × 15 ft) |
| Power | 14 kW at Earth, 435 W at Jupiter 2 × 55-ampere-hour lithium-ion batteries |
| Start of mission | |
| Launch date | August 5, 2011, 16:25 UTC |
| Rocket | Atlas V 551 (AV-029) |
| Launch site | Cape Canaveral SLC-41 |
| Contractor | United Launch Alliance |
| Flyby of Earth | |
| Closest approach | October 9, 2013 |
| Distance | 559 km (347 mi) |
| Jupiter orbiter | |
| Orbital insertion | July 5, 2016, 03:53 UTC 10 years, 4 months, 3 days ago |
| Orbits | 37 (planned) |
| Orbit parameters | |
| Perijove | 4,200 km (2,600 mi) altitude 75,600 km (47,000 mi) radius |
| Apojove | 8.1 million km (5.0 million mi) |
| Inclination | 90 degrees (polar orbit) |
Juno mission insignia | |
Juno is an unmanned NASA New Frontiers spacecraft. It studies the planet Jupiter from orbit. It is the first mission to an outer planet to use solar panels for power instead of a radioisotope thermoelectric generator. The spacecraft was launched on August 5, 2011 from the Cape Canaveral Air Force Station and entered a polar orbit of Jupiter on July 5, 2016. Scott Bolton is leading the mission.
Juno's main goal is to understand the origin and evolution of Jupiter. Juno will also study the planet's atmospheric composition, gravity field, magnetic field, and polar magnetosphere.