... Forthcoming Close Angular Approaches of Planets to Radio Sources and Possibilities to Use Them as GR Tests Z. M. Malkin, V. N. L'vov, and S. D. Tsekmeister Center Astromical Observatory at Pulkovo of the Russian Academy of Scienced, Pulkovskoe sh. ... At the same time, only Jupiter and Saturn provide noticeable relativistic effects approaching the radio sources at angular distances of about a few planet radii. ... 4 2009 Saturn approaches to radio sources are given in Tables 4 and 5, respectively. ...