Table 1
Orbital solutions.
| Parameter | orbfit-lib | spinOS | S25a |
|---|---|---|---|
| P (d) | 87.849 ± 0.024 | 87.831 ± 0.010 | 88.00 ± 0.02 |
| T0 (RJD) | 60101.08 ± 0.20 | 60101.111 ± 0.052 | 53511.8 ± 0.07 |
| e | 0.17967 ± 0.00070 | 0.17931 ± 0.00017 | 0.13 ± 0.05 |
| a″ (mas) | 7.203 ± 0.010 | 7.20 ± 0.27 | − |
| iorb (°) | 71.311 ± 0.072 | 71.348 ± 0.020 | 69 ± 11 |
| Ω (°) | 303.38 ± 0.11 | 303.385 ± 0.034 | 301 ± 4 |
| ωAa (°) | 4.72 ± 0.86 | 4.80 ± 0.24 | 32 ± 4 |
| KAa (km s−1) | 55.2 ± 6.3 | 55.5 ± 3.6 | 57 ± 5 |
| KAb (km s−1) | 65.6 ± 6.3 | 65.7 ± 3.6 | 67 ± 5 |
| γ (km s−1) | −14.6 ± 3.3 | −14.6 ± 1.5 | −16 ± 2 |
| a (AU) | 1.014 ± 0.074 | 0.995 ± 0.026 | 1.06 ± 0.08 |
| q = MAb/MAa | 0.84 ± 0.12 | 0.845 ± 0.072 | 0.83 ± 0.14 |
| Mtotal (M⊙) | 18.0 ± 4.0 | 17.0 ± 1.3 | 21 ± 8 |
| MAa (M⊙) | 9.8 ± 2.2 | 9.21 ± 0.79 | 11 ± 3 |
| MAb (M⊙) | 8.2 ± 2.0 | 7.79 ± 0.70 | 10 ± 3 |
| d (pc) | 141 ± 10 | 138.2 ± 3.6 | 139 ± 3 |
| rms astrometry (μas) | 18 | 19 | − |
| rms RVAa (km s−1) | 15.5 | 15.9 | 11.9 |
| rms RVAb (km s−1) | 14.5 | 15.5 | 15.2 |
Notes. P is the orbital period, T0 is the epoch of periastron or the epoch of the superior conjunction, e is the eccentricity, a″ is the angular semimajor axis of the orbit, iorb is the orbital inclination, Ω is the longitude of the ascending node, ω is the longitude of the periastron, K are the velocity semi-amplitudes, γ is the systemic velocity, a is the orbital semimajor axis, q = MAa/MAb is the mass ratio, Mtotal is the total mass, and MAb and MAa are the masses of the two components. “rms” stands for the root mean square residuals of specified datasets. (a) Orbital elements and physical parameters based on the spectroscopic solution and evolutionary fitting from Shultz et al. (2025).
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