Table 5
Comparison of the different astrometric parameters and radial velocities obtained for GJ 710 from HIPPARCOS, Gaia DR1, and Gaia DR2 data.
| Parameters | Hipparcos | Gaia DR1 | Gaia DR2 |
|---|---|---|---|
| ϖ (mas) | 51.12 ± 1.63 | 52.35 ± 0.27 | 52.51 ± 0.04 |
| μα* (mas yr−1) | 1.15 ± 1.66 | −0.47 ± 0.13 | −0.45 ± 0.08 |
| μδ (mas yr−1) | 1.99 ± 1.22 | −0.18 ± 0.09 | −0.02 ± 0.07 |
| μtot (mas yr−1) | 2.30 ± 2.06 | 0.50 ± 0.16 | 0.46 ± 0.11 |
| vrad (km s−1) | −13.80 ± 0.30(*) | −13.80 ± 0.30(*) | −14.52 ± 0.43(**) |
| tph (Myr) | 1.385 [1.109, 1.500] | 1.353 [1.219, 1.541] | 1.281 [1.109, 1.500] |
| dph (pc) | 0.302 [0.302, 0.324] | 0.062 [0.014, 0.116] | 0.054 [0.003, 0.106] |
Notes. The last two rows represents the time and the closest approach distance to the Sun of GJ 710 with its respective confidence interval.
References. (*) Pulkovo catalogue (Gontcharov 2006), (**)Gaia DR2 radial velocity catalogue (Soubiran et al. 2018).
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