Measured position of HIP 64892B relative to HIP 64892A. The 2011 NACO L′, 2016 IRDISH2, and 2017 IRDIS K1 positions are shown with blue triangles. The predicted motion for a stationary background object relative to the 2016 position is marked by the black line, with its uncertainty represented by the grey shaded region. The observed positions of HIP 64892B strongly conflict with the predictions for a background object, suggesting that it is co-moving.