%0 Journal Article %T The Expanding Universe, Planetary Motion and the Pioneer 10/11 Anomaly %A A. Lewis Licht %J Physics %D 2001 %I arXiv %X The effect of the expanding universe on planetary motion is considered to first order in the Hubble constant H. Orbital elements are shown to be unaffected, but there is a small change in the connection between planetary proper time and coordinate time. This can produce an apparent anomalous acceleration in velocities inferred from echo-ranging, but the effect is too small by many orders of magnitude to account for the Pioneer 10/11 anomaly. %U http://arxiv.org/abs/gr-qc/0102103v1