QCD thermodynamics with 2+1 flavors at nonzero chemical potential

We present results for the QCD equation of state, quark densities, and susceptibilities at nonzero chemical potential, using $2+1$ flavor asqtad ensembles with ${N}_{t}=4$. The ensembles lie on a trajectory of constant physics for which ${m}_{ud}\ensuremath{\approx}0.1{m}_{s}$. The calculation is performed using the Taylor expansion method with terms up to sixth order in $\ensuremath{\mu}/T$.