  A new variational technique determines the general condition of equilibrium
of a rotating gravito-electromagnetic system and provides a modified dynamical
equation of motion from where it emerges a so-far unforseen topological torsion
current (TTC) [Mario J. Pinheiro (2013) 'A Variational Method in
Out-of-Equilibrium Physical Systems', Scientific Reports {\bf 3}, Article
number: 3454]. We suggest that the TTC may explain, in a simple and direct way,
the anomalous acceleration detected in spacecrafts during close planetary
flybys. In addition, we theorize that TTC may represent an unforeseen
relationship between linear momentum and angular motion through the agency of a
vector potential.
