Stellar orbits have constrained the distribution of mass in the Galactic Center to scales where the existence and mass of a black hole can be determined. We investigated how near-IR interferometers can improve upon the current state-of-the art adaptive optics observations. Work described in Stone et al. (2012) argues that such observations will substantially improve existing constraints, and possible enable the detection of General Relativistic or other non-Keplerian effects.

Simulated observed positions of a starfield around SgrA*, demonstrating that VLTI/Gravity can plausibly map orbits of multiple stars with periods substantially shorter than those currently known.