Where is Deimos? In order to improve the orbital models for the
martian moon, researchers have developed a new technique that
compares images taken by Mars Express. October 3, 2012 Despite
more than a century of observations, scientists still don’t know
the orbit of the martian moon Deimos to a high degree of
accuracy. But a new study using images taken by the European
Space Agency’s (ESA) Mars Express orbiter has provided the best
orbital model to date. Mars Express image of the moons Phobos
(foreground) and Deimos (background). // Credit: ESA/DLR/FU
Berlin (G. Neukum) Some 135 years have passed since Asaph Hall
discovered Phobos and Deimos, two small companions of the planet
Mars. Since that time, the satellites have been imaged
innumerable times from Earth and from spacecraft, including
recent measurements by the panoramic cameras on the Mars
Exploration Rovers and instruments on the Mars Reconnaissance
Orbiter. Although the orbit of the inner moon, Phobos, has been
calculated to an accuracy of less than 0