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Table 3.
Parameters of the TU UMa system from the combined analysis of the spectroscopic orbit of Liška et al. (2016a; their Model 2) and the proper motion anomaly vectors.
| Adopted parameters | |
| Parallax from GDR2 ϖ | 1.592 ± 0.063 mas |
| Mass of RRL m1 | 0.6 ± 0.1 M⊙ |
| Parameters from Liška et al. (2016a) | |
| Orbital period P | 8499 ± 29 d |
| Eccentricity e | 0.686 ± 0.025 |
| Arg. of periastron ω | 184 ± 2 deg |
| vr amplitude K1 | 5.2 ± 0.4 km s−1 |
| vr at Hip epoch | +0.33 ± 0.16 km s−1 |
| vr at GDR2 epoch | +0.83 ± 0.14 km s−1 |
| PMa vectors | |
| μHip | [+ 0.2±1.1, +3.0±1.1] mas a−1 |
| μG2 | [+ 0.75±0.12, +0.30±0.14] mas a−1 |
| Parameters from present analysis | |
| Inclination i | 160 ± 6 deg |
| Semimajor axis a | 11.18 ± 0.51 au |
| Ang. semimajor axis θ | 17.8 ± 1.1 mas |
| Long. of asc. node Ω | 358 ± 23 deg |
| Mass of secondary m2 | 1.98 ± 0.33 M⊙ |
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