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Table 1
Parallax, proper motion, orbital elements and masses of α Cen.
| Parameter | P16a | K16b |
|
|
||
| π (mas) | 743 ± 1.3 | 747.17 ± 0.61 |
|
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| μα (mas yr-1)c | − 3619.9 ± 3.9 | |
| μδ (mas yr-1)c | + 693.8 ± 3.9 | |
| vα (km s-1)c | − 22.9666 ± 0.0193 | |
| vδ (km s-1)c | + 4.4019 ± 0.0037 | |
| vr (km s-1)c | − 22.390 ± 0.0042 | − 22.3930 ± 0.0043 |
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| a (″) | 17.66 ± 0.026 | 17.592 ± 0.013 |
| i (deg) | 79.32 ± 0.044 | 79.320 ± 0.011 |
| ω (deg) | 232.3 ± 0.11 | 232.006 ± 0.051 |
| Ω (deg) | 204.85 ± 0.084 | 205.064 ± 0.033 |
| P (yr) | 79.91 ± 0.013 | 79.929 ± 0.013 |
| T0 (yr) | 1955.66 ± 0.014 | 1955.604 ± 0.013 |
| e | 0.524 ± 0.0011 | 0.5208 ± 0.0011 |
| ΔVA (m s-1) | − | 8 ± 5 |
| ΔVB (m s-1) | 329 ± 9 | 322 ± 5 |
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| mtot (M⊙) | 2.0429 ± 0.0072 | |
| mB/mtot | 0.4617 ± 0.00044 | 0.45884 ± 0.00027 |
| mA (M⊙) | 1.133 ± 0.0050 | 1.1055 ± 0.0039 |
| mB (M⊙) | 0.972 ± 0.0045 | 0.9373 ± 0.0033 |
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