Abstract
Microlensing experiments are returning increasingly detailed information about the planetary and binary systems that are being detected, far beyond what was originally expected. In several cases the lens mass and distance are measured, and a few very special cases have yielded complete 8-parameter Kepler solutions, i.e., the masses of both components, five Kepler invariants and the phase. We identify one such case that is suitable for a precision test that could be carried out by comparing Doppler (RV) measurements with the predictions from the microlensing solution. The lens primary is reasonably bright (I=16.3, V=18.0) and is expected to have a relatively large RV semi-amplitude K ~ 6.35 km/s).
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