Radio Science with Voyager 2 at Uranus: Results on Masses and Densities of the Planet and Principal Satellites Anderson, J. D. ; Campbell, J. K. ; Jacobson, R. A. ; Sweetnam, D. N. ; Taylor, A. H. ; Tyler, G. L. ; Prentice, A. J. R. Abstract Publication: Bulletin of the American Astronomical Society Pub Date: June 1987 Bibcode: 1987BAAS...19..819A