Orbit of STA 3 = HIP 93903. (a) The orbit calculated by Hartkopf & Mason (2014), together with the available observational data. (b) The orbit revision proposed here, which has a much shorter period and implies a much higher mass sum, as described in the text. Here, a quadrant flip is proposed for observations after 1992. In both plots, the cross marks the origin of the relative orbit, the open circles represent data points in the literature, the filled circles indicate observations taken at WIYN and appearing in Table 3, the green squares are the results from APO, and an arrow indicates the direction of orbital rotation (clockwise). Line segments are drawn from the ephemeris position on the orbit to the data point in each case. North is down, east is to the right.