Relativistic light deflection effects in high-accuracy astro-metric observations close to planets of the solar system are analyzed using real star catalogue and appropriate relativistic modelling. The gravitational deflection effects involve deflection due to monopole and quadrupole gravitational fields and due to translational motion of the corresponding planet. The data reduction scheme incorporates the Bayesian analysis as a robust way to estimate the magnitude of the effects as well as the confidence levels for the fitted values.