Table 3.
HIPPARCOS-2 and Gaia DR2 proper motion and proper motion deduced from the difference of position.
| μRA |  |
μDec |  |
|
|---|---|---|---|---|
| (mas yr−1) | (mas yr−1) | |||
| HIPPARCOS | 93.6 | 0.66 | 0.4 | 0.37 |
| HIPPARCOS-Gaia | 94.21 | 0.02 | 0.17 | 0.014 |
| Gaia | 93.8 | 0.1 | −0.11 | 0.09 |
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