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Mid-infrared observations of IK Tau have been made at 11.15 m with the three-telescope Infrared Spatial Interferometer on Mount Wilson and also using individual segments of the Keck telescope for multiple-aperture interferometry on the Keck telescope at 10.7 m. Both experiments provided closure phase and show temporal variations and asymmetries in the surrounding dust, with a difference of about 15% in intensity between two sides of the star. Asymmetries have been previously observed in thedoi:10.1086/498062 fatcat:d3bk2tqeorbp5hmfyr6dauijd4