Fig. 1. Astrometric orbit (prograde or retrograde) of the photo-center of UMi AP. The retrograde orbit is our preferred solution. For detailed explanations see Sect. 3.2.4
![[FIGURE]](img52.gif)
![[FORMULA]](img50.gif)
UMi AP. The retrograde orbit is our preferred solution. For detailed explanations see Sect. 3.2.4