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We present the latest developments to the phase modulation method for findingbinaries among pulsating stars. We demonstrate how the orbital elements of apulsating binary star can be obtained analytically, that is, without convertingtime delays to radial velocities by numerical differentiation. Using the timedelays directly offers greater precision, and allows the parameters of muchsmaller orbits to be derived. The method is applied to KIC9651065, KIC10990452,and KIC8264492, and a set of the orbital parameters is obtained for eachsystem. Radial velocity curves for these stars are deduced from the orbitalelements thus obtained.

Deriving the orbital properties of pulsators in binary systems through their light arrival time delays