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Table 2
Astrometric orbits based on the original Hipparcos data with and without spectroscopic help.
| Spectro-based | ||||
| Element | Original | Tycho-2 | Campbell | Thiele-Innes |
|
|
||||
| e | 0 (fixed) | 0.589 (fixed) | ||
| P (d) | 877.6541 ± 117.3686 | 1126.11 (fixed) | ||
| T0 (JD-2 400 000) | 48 589.2621 ± 38.5598 | 53 766.2 (fixed) | ||
| a0 (mas) | 5.91 ± 0.93 | 8.4 ± 0.52 | 9.8 | |
| i (deg) | 93.51 ± 5.34 | 93 ± 4.7 | 93 | |
| ω (deg) | 0 (fixed) | 201.6 (fixed) | 196 | |
| Ω (deg) | 161.88 ± 6.94 | 159 ± 6.4 | 156 | |
| A (mas) | 8 ± 1.0 | |||
| B (mas) | −4 ± 1.0 | |||
| F (mas) | −2.7 ± 0.80 | |||
| G (mas) | −0.6 ± 0.67 | |||
| F2 | 0.10 | –0.83 | –0.87 | |
| K1 (km s-1) | 6.93 | 9.21 (fixed) | 11 | |
| ϖ (mas) | 10.55 ± 0.69 | 10.87 ± 0.67 | 10.6 ± 0.69 | |
| μα ∗ (mas yr-1) | −34.32 ± 0.68 | −33.7 ± 0.7 | −35.3 ± 0.74 | −35.7 ± 0.78 |
| μδ (mas yr-1) | −28.34 ± 1.39 | −26.0 ± 0.6 | −25.8 ± 0.52 | −25.4 ± 0.61 |
Notes.The second column lists the published solution (ESA 1997). As in the Hipparcos Catalogue, F2 denotes the goodness of fit and ϖ the parallax. The third column lists the proper motion after Tycho-2 (Høg et al. 2000).
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