On-sky positional uncertainties of Uni’s satellite, Tinia. In the left panel, we show the ephemeris uncertainty over the span 2025–2035 averaged over Uni-Tinia’s 8.3 day orbit. In the right panel, we show the ephemeris uncertainty around the time of the observed occultation (see Section 3.2). Gray dashed, dotted, and dotted–dashed lines show the uncertainty contributions from the satellite orbit, the primary’s heliocentric orbit, and the barycentric wobble, respectively. Solid, colored lines show the combined uncertainty given by Equation (4). Uni’s heliocentric ephemeris uncertainty is given by JPL Horizons (JPL#56).