Librational motion of Phobos
Résumé
Mars' satellite Phobos is the target of the Russian space mission Phobos-Grunt. One objective of this mission is to measure the rotational motion of Phobos by using Doppler and Star Tracker measurements. The purpose of this paper is to model the rotational motion of Phobos based on the recently determined ephemerides [1] and constraints on its interior [2,3].