Excluding Primordial Black Holes as Dark Matter Based on Solar System Ephemeris

Current cosmological constraints allow primordial black holes (PBHs) to constitute dark matter in the mass range of ${10}^{18}$-${10}^{22}$g. We show that a major portion of this logarithmic window can be ruled-out based on the Solar System ephemeris, given that the external mass enclosed within 50 au from the Sun did not change by more than $\sim 5\times {10}^{-14}$ solar masses per year in recent decades.