Program: GN-2014B-Q-73

Recent results from the MOST microsatellite and ground-based spectroscopy have found that the bright belt star of Orion, Mintaka (delta Ori), is extremely undermassive. The components have spectral types of O9.7 II and an early B star, but the masses are only 12 and 6 solar masses. One complication is that the stars are orbited by a third star that is roughly 1.5 mag fainter in the optical. If this is not accounted for properly in the analysis, the masses may be wrong. Here we propose an experiment to complement upcoming UV observations of the system in order to characterize the third component and disentangle the spectra from the eclipsing binary by using the AO system on Gemini North with GNIRS.