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Schematic diagram of Mars Express' Phobos encounters

Schematic diagram of Mars Express' Phobos encounters

ESA

Schematic diagram of Mars Express' Phobos encounters
Phobos orbits Mars in a nearly circular, equatorial orbit. Mars Express orbits Mars in an elliptical, polar orbit with a close approach in the high northern latitudes. Mars Express' orbit drifts westward over time. Most of the time, Mars Express is far from Phobos, but about once every five months there is a series of 10 to 12 close encounters with the moon, during which Mars Express shifts from studying Mars to studying Phobos.

Most ESA images can be reused for noncommercial purposes as long as they are properly credited. For more information and other uses, read ESA's copyright notice.

Explore related images: Mars Express, Mars, trajectory diagrams, Phobos

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