2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/121524In this paper we test the hypothesis that the Pioneer anomaly can be of gravitational origin by comparing the predicted model-independent shifts Delta a/a for the semimajor axis of Uranus and Neptune with the Voyager 2 radio-technical distance measurements performed at JPL-NASA. As in the case of other tests based on different methods and data sets (secular perihelion advance, right ascension/declination residuals over about one century), the orbits of the investigated planets are not affected by any anomalous acceleration like that experienced by the Pioneer 10/11 spacecraft.LaTex2e, 8 pages, no figures, no tables, 17 referencesGeneral Relativity and Quantum CosmologyAstrophysicsHigh Energy Physics - PhenomenologySpace Physicstext