A metric representing a slowly rotating object with quadrupole moment is obtained using a perturbation method to include rotation into the weak limit of the Erez-Rosen metric. This metric is intended to tackle relativistic astrometry and gravitational lensing problems in which a quadrupole moment has to be taken into account.
A REDUCE code for the Newman-Janis algorithm is described. This algorithm is
intended to include rotation into nonrotating solutions of the Einstein field
equations with spherically symmetry or perturbed spherically symmetry and has
been successfully applied to many spacetimes. The applicability of the code is
restricted to metrics containing potentials of the form 1/r
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