Theoretical Formulation of the Phobos, moon of Mars, rate of altitudinal   loss
  Phobos is a moon of mars below the synchronous orbit. Because of tidal interaction it is losing its altitude and is launched on a shrinking spiral path of total destruction. Based on planetary-satellite dynamics its rate of loss of altitude is calculated to be twenty meters per century and its doomsday is predicted to be at eleven mega years from now. 
Bijay Kumar Sharma