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Table 1
Parameters of the Aa–Ab orbit of β Cen.
| Parameter | Visual orbit | Spectroscopic orbit | Combined orbits |
|
|
|||
| Orbital period, Porb [yr] | 0.9788 |
0.97719 |
0.97720 |
| Orbital period, Porb [d] | 357.49 |
356.911 |
356.915 |
| Eccentricity, e | 0.8201 |
0.8237 |
0.8245 |
| Longitude of periastron, ω [o] | 60.1 |
61.13 |
60.87 |
| Time of periastron passage, T0 [Besselian epoch] | 2000.1509 |
2000.15209 |
2000.15202 |
| Inclination, i [o] | 66.76 |
– | 67.68 |
| Position angle of the line of nodes, Ω [o] | 108.69 |
– | 108.80 |
| Angular semimajor axis of the relative orbit, a′′ [mas] | 24.71 |
– | 25.15 |
| Systemic velocity, γ [km s-1] | – | 9.61 |
9.59 |
| Half-range of radial velocity for primary, K1 [km s-1] | – | 62.9 |
62.9 |
| Half-range of radial velocity for secondary, K2 [km s-1] | – | 72.36 |
72.35 |
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