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We report on the first calculations of fully relativistic binary circularorbits to span a range of separation distances from the innermost stablecircular orbit (ISCO), deeply inside the strong field regime, to a distance($\sim$ 200 km) where the system is accurately described by Newtonian dynamics.We consider a binary system composed of two identical corotating neutron stars,with 1.43 $M_\odot$ gravitational mass each in isolation. Using a conformallyflat spatial metric we find solutions to the initial value equations thatcorrespond to semi-stable circular orbits. At large distance, our numericalresults agree exceedingly well with the Newtonian limit. We also present a selfconsistent determination of the ISCO for different stellar masses.Comment: 4 pages, 3 postscript figures. Data points added to fig 2; some  issues clarified; references adde

Binary neutron-star systems: From the Newtonian regime to the last stable orbit