While several spacecraft have visited and studied Jupiter, none have been put into orbit around the planet.

Here's why:

* Technical Challenges: Orbiting Jupiter is incredibly difficult. The planet's powerful gravity requires immense amounts of fuel and complex maneuvering to achieve and maintain orbit.

* Radiation Environment: Jupiter has a very strong magnetic field and intense radiation belts, which pose significant challenges for spacecraft.

* Scientific Focus: Many of the missions focused on studying Jupiter's moons, its atmosphere, and its magnetic field. These goals didn't necessitate orbiting the planet.

The spacecraft that have flown by or orbited Jupiter's moons include:

* Pioneer 10 and 11 (flybys)

* Voyager 1 and 2 (flybys)

* Ulysses (flyby)

* Galileo (orbiting Jupiter and several moons)

* Cassini (flyby)

* Juno (orbiting Jupiter)

While no satellites orbit Jupiter itself, there are several missions planned for the future that may involve orbiting some of its moons, such as Europa and Ganymede.