2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/204438Unparticle exchange gives rise to long range forces which deviate from the inverse square law due to non-canonical dimension of unparticles. It is well known that a potential of the form $r^{-n}$ where $n$ is not equal to one gives rise to a precession in the perihelion of planetary orbits. We calculate the constraints on unparticle couplings with baryons and leptons from the observations of perihelion advance of Mercury orbit.Version to be appeared in PRDHigh Energy Physics - PhenomenologyAstrophysicsGeneral Relativity and Quantum Cosmologytext