Jupiter Icy Moon Explorer
JUICE (Jupiter Icy Moon Explorer; German Jupiter icy moon - explorer ) is a planned ESA mission into the outer solar system with the aim to explore the four Galilean moons of the planet Jupiter.
Prehistory
The selection of the JUICE mission was announced by the ESA on May 2, 2012. It is the first large -class mission in ESA's Cosmic Vision 2015-2025 program and sat down in the final round of the competition against the proposals of a gravitational wave observatory (New Gravitational Wave Observatory, NGO) and a telescope for high -energy astrophysics (Advanced Telescope for High -Energy Astrophysics, ATHENA ) by.
JUICE is rededicated project of the Jupiter Ganymede Orbiter, which should be Jupiter System Mission, the contribution of ESA to Europe. Since the joint project with NASA, however, was provided by budget cuts at NASA questioned, ESA decided to carry out a self- conducted mission.
Trajectory
JUICE is to start in June 2022 by an Ariane 5 ECA rocket from the Guiana Space Centre and weigh 4800 kg. Your hyperbolic excess velocity should be 3.15 km / s. JUICE is to carry on the earth after a Sonnenumkreisung a swing-by maneuver. Then, a swing-by is planned to Venus, followed by two other swing bys of the earth. After that, the probe traveling to Jupiter, to be reached in January 2030 and brakes through a two-hour firing its engine and a decelerating swing-by on Ganymede in Jupiter's orbit. After two years and several flybys of Europa and Callisto in 2032 it should enter into orbit around Ganymede, she is first orbiting in an elliptical orbit 200-10000 km altitude. Thereafter, circular orbits of 5000, 500 and 200 km altitude are sought.
Description
JUICE is three-axis stabilized, has an empty weight of about 1800 kg is its electrical energy through GaAs solar gain, which are mounted on two panels with a total size of about 60 to 75 m². For data transmission JUICE uses a satellite dish, which allows a data rate of 1.4 GB per day in the Ka- and X-band. Because there are three competing different plans for the spacecraft, the three different probe proposals more antennas. With two proposals, the main antenna is a parabolic mirror with 3.2 m diameter and the third a parabolic mirror 3.5 m in diameter. Juices drive system is used as fuel and the oxidizer MMH MON. There is a proposal for a spacecraft with two main engines (one in reserve)., And two proposals with only one main engine In the ESA study eleven potentially possible tools have been proposed with a total mass of 104 kg for JUICE.
The ESA finally selected following eleven instruments for JUICE.
Bits / sec