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Table 3
Orbital parameters for the GJ 338 stellar binary system.
| Combined astrometric and spectroscopic solution | |||
|---|---|---|---|
| Parameter | Description (unit) | Adopted solution | |
| α | Semi-major axis (arcsec) | 20.66 ± 0.80 | |
| a | Semi-major axis (au) | 130.9 ± 5.1 | |
| T0 | Time of periastron passage (a) | 1513 ± 61 | |
| e | Eccentricity | 0.01 |
|
| i | Inclination (deg) | 37 ± 12 | |
| Ω | Argument of ascending node (deg) | 32.4 ± 1.8 | |
| ω | Argument of periastron (deg) | 109.1 ± 6.0 | |
| P | Period (a) | 1295 ± 180 | |
| KA | Amplitude (km s−1) | 0.93 ± 0.12 | |
| KB | Amplitude (km s−1) | 0.99 ± 0.12 | |
| M | Total mass (M⊙) | 1.33 ± 0.17 | |
| q | Mass ratio, KA∕KB | 0.93 ± 0.10 | |
| MA | Mass of the primary (M⊙) | 0.69 ± 0.07 | |
| MB | Mass of the secondary (M⊙) | 0.64 ± 0.07 | |
| γ | Systemic velocity (km s−1) | 11.798 ± 0.001 | |
| Mass ratio (a) from equation q = (vA − γ)∕(γ − vB) | |||
| q | Mass ratio, MB∕MA | 0.930 ± 0.021 | |
| γ | Systemic velocity (km s−1) | 11.797 ± 0.001 | |
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