Notes. Estimates for astrometric models of stellar motions M with mean positions at mean epoch t₀. The number of individual positions employed for derivation of the respective model is given in column Σn for the fifteen stars discussed in this study. The parameters from literature references (ref.) and Gaia EDR3 are indicated on the first line for each star segment. In case two literature references are given in one line, the first one describes the original data, and the second one points to improved data as given in the respective reference (e.g., positions were shifted to ICRF3 or positions were determined as they were not provided in the first reference). In that case, the parameters reported on the corresponding line are those from the second reference. An ellipsis (…) indicates the omission of an entry. ⁽¹⁾Chosen as the best solution for rotation parameter estimation in the following sections. ⁽²⁾Including orbital fit.

References. (1) Galli et al. (2018); (2) Lindegren (2020a); (3) Miller-Jones et al. (2013); (4) Kounkel et al. (2017); (5) Ortiz-León et al. (2017); (6) Lestrade et al. (1999); (7) Ratner et al. (2012); (8) Titov et al. (2020).