Ganymede

The semi-major axis of Jupiter's orbit about the Sun is 5.2 astronomical units (483 million miles or 778 million km). Ganymede orbits at a mean distance of 665,000 miles (1 million km) from Jupiter.

The image was created from Hubble data from the following proposal: 12244 PI: J. Saur (University of Cologne, Germany), P. Feldman and D. Strobel (JHU), K. Retherford (SwRI), M. McGrath (NASA/MSFC), and S. Duling (University of Cologne, Germany).

The science team includes: J. Saur and S. Duling (University of Cologne, Germany), L. Roth (SwRI/University of Cologne, Germany), D. Strobel and P. Feldman (JHU), U. Christensen (Max Planck Institute for Solar System Research, Katlenburg-Lindau, Germany), K. Retherford (SwRI), M. McGrath (NASA/MSFC), F. Musacchio, A. Wennmacher, and F. Neubauer (University of Cologne, Germany), and S. Simon (Georgia Institute of Technology, Atlanta), and O. Hartkorn (University of Cologne, Germany).

NASA, ESA, and Z. Levay (STScI)