Table 3.
Comparison of Gaia data to HIPPARCOS and HST parallaxes.
| Name | π ± σπ (mas) | GOF | εi (mas) | D | π ± σπ (mas) | εi (mas) | R | π± σπ (mas) | GOF | R | π ± σπ (mas) | GOF | R | π± σπ (mas) | R | π ± σπ (mas) | R | π ± σπ (mas) | R |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| α UMi | … | 271.04 | 7.46 | 15200 | … | … | – | 7.56 ± 0.48 | 1.22 | 3 | 7.54 ± 0.11 | 1.08 | 4 | 7.72 ± 0.12 | 5 | … | – | 7.620 ± 0.080 | 3,4,5 |
| Polaris B | 7.292 ± 0.028 | 12.22 | 0.00 | 0 | … | … | – | … | … | – | … | … | – | … | – | 6.26 ± 0.24 | 10 | … | – |
| β Dor | 3.112 ± 0.284 | 170.94 | 1.62 | 1340 | … | … | – | 3.14 ± 0.59 | −0.38 | 3 | 3.24 ± 0.36 | 13.84 | 4 | 3.64 ± 0.28 | 5 | 3.14 ± 0.16 | 7 | 3.256 ± 0.135 | 3,5,7 |
| δ Cep | −1.172 ± 0.468 | 182.21 | 2.44 | 2100 | … | … | – | 3.32 ± 0.58 | 0.41 | 3 | 3.77 ± 0.16 | −2.45 | 4 | 3.81 ± 0.20 | 5 | 3.66 ± 0.15 | 7 | 3.723 ± 0.095 | 3,4,5,7 |
| FF Aql | 1.810 ± 0.107 | 65.83 | 0.49 | 100 | 1.64 ± 0.89 | 3.14 | 2 | 1.32 ± 0.72 | 0.43 | 3 | 2.11 ± 0.33 | 0.77 | 4 | 2.05 ± 0.34 | 5 | 2.81 ± 0.18 | 7 | 2.543 ± 0.143 | 4,5,7 |
| l Car | 0.777 ± 0.257 | 171.10 | 1.67 | 1190 | … | … | – | 2.16 ± 0.47 | −0.49 | 3 | 2.09 ± 0.29 | 5.81 | 4 | 2.06 ± 0.27 | 5 | 2.01 ± 0.20 | 7 | 2.042 ± 0.152 | 3,5,7 |
| RS Pup | 0.584 ± 0.026 | 7.74 | 0.00 | 0 | 0.63 ± 0.26 | 0.65 | 2 | 0.49 ± 0.68 | −0.73 | 3 | 1.91 ± 0.65 | 0.73 | 4 | 1.44 ± 0.51 | 5 | 0.524 ± 0.022 | 6 | … | – |
| RT Aur | 1.419 ± 0.203 | 52.32 | 0.77 | 132 | … | … | – | 2.09 ± 0.89 | −0.05 | 3 | −1.10 ± 1.41 | 10.29 | 4 | −0.23 ± 1.01 | 5 | 2.40 ± 0.19 | 7 | 2.40 ± 0.19 | 7 |
| SS CMa | 0.201 ± 0.029 | 4.37 | 0.00 | 0 | 0.69 ± 0.23 | 0.35 | 2 | −0.37 ± 1.75 | 1.32 | 3 | 0.40 ± 1.78 | 1.81 | 4 | 0.35 ± 1.86 | 5 | 0.389 ± 0.029 | 9 | … | – |
| S Vul | 0.305 ± 0.041 | 7.98 | 0.00 | 0 | −0.21 ± 0.43 | 0.53 | 2 | … | … | – | … | … | – | … | – | 0.322 ± 0.040 | 9 | … | – |
| SY Aur | 0.313 ± 0.052 | 3.35 | 0.00 | 0 | 0.69 ± 0.25 | 0.48 | 2 | 1.15 ± 1.70 | 0.27 | 3 | −1.84 ± 1.72 | 1.31 | 4 | −0.52 ± 1.44 | 5 | 0.428 ± 0.054 | 8 | … | – |
| T Vul | 1.674 ± 0.089 | 44.55 | 0.33 | 56 | … | … | – | 1.95 ± 0.60 | −0.24 | 3 | 2.71 ± 0.43 | 1.37 | 4 | 2.31 ± 0.29 | 5 | 1.90 ± 0.23 | 7 | 2.156 ± 0.166 | 4,5,7 |
| VX Per | 0.330 ± 0.031 | 3.81 | 0.00 | 0 | 0.50 ± 0.27 | 0.71 | 2 | 1.08 ± 1.48 | 0.04 | 3 | 0.87 ± 1.52 | 1.07 | 4 | 1.10 ± 1.62 | 5 | 0.420 ± 0.074 | 9 | … | – |
| VY Car | 0.512 ± 0.041 | 1.64 | 0.00 | 0 | 0.73 ± 0.29 | 0.62 | 2 | 1.28 ± 1.76 | 2.88 | 3 | 0.36 ± 1.42 | 4.91 | 4 | 1.56 ± 0.91 | 5 | 0.586 ± 0.044 | 9 | … | – |
| W Sgr | 1.180 ± 0.412 | 88.20 | 1.40 | 371 | … | … | – | 1.57 ± 0.93 | 0.47 | 3 | 3.75 ± 1.12 | 10.40 | 4 | 2.59 ± 0.75 | 5 | 2.28 ± 0.20 | 7 | 2.28 ± 0.20 | 7 |
| WZ Sgr | 0.513 ± 0.077 | 3.52 | 0.00 | 0 | … | … | – | −0.75 ± 1.76 | −0.40 | 3 | 3.50 ± 1.22 | −0.12 | 4 | 2.46 ± 1.12 | 5 | 0.512 ± 0.037 | 9 | … | – |
| X Pup | 0.302 ± 0.043 | 1.20 | 0.00 | 0 | 0.28 ± 0.29 | 0.58 | 2 | −0.05 ± 1.10 | 1.31 | 3 | 1.97 ± 1.26 | −0.82 | 4 | 2.87 ± 0.92 | 5 | 0.277 ± 0.047 | 9 | … | - |
| X Sgr | 3.431 ± 0.202 | 73.61 | 0.78 | 151 | … | … | – | 3.03 ± 0.94 | 0.63 | 3 | 3.31 ± 0.26 | −0.63 | 4 | 3.39 ± 0.21 | 5 | 3.00 ± 0.18 | 7 | 3.197 + 0.121 | 4,5,7 |
| XY Car | 0.330 ± 0.027 | 7.50 | 0.00 | 0 | 0.19 ± 0.24 | 0.50 | 2 | −0.62 ± 0.95 | −0.05 | 3 | −1.02 ± 0.88 | 0.18 | 4 | −0.75 ± 0.87 | 5 | 0.438 ± 0.047 | 9 | … | – |
| Y Sgr | −0.470 ± 0.280 | 73.09 | 0.75 | 143 | … | … | – | 2.52 ± 0.93 | −2.19 | 3 | 2.64 ± 0.45 | −0.92 | 4 | 3.73 ± 0.32 | 5 | 2.13 ± 0.29 | 7 | 2.812 ± 0.194 | 4,5,7 |
| ζ Gem | 2.250 ± 0.301 | 90.10 | 1.16 | 389 | … | … | – | 2.79 ± 0.81 | −0.18 | 3 | 2.37 ± 0.30 | 1.19 | 4 | 2.71 ± 0.17 | 5 | 2.78 ± 0.18 | 7 | 2.689 ± 0.114 | 4,5,7 |
Notes. Columns 2-5: parallax (error), GOF, excess noise parameter, and significance from GDR2. Columns 6 and 7: parallax (error) and excess noise from GDR1 (reference 2). Columns 9 and 10: parallax (error) and GOF parameter from HIPPARCOS (Reference 3; ESA 1997). Columns 12 and 13: parallax (error) and GOF parameter from HIPPARCOS (reference 4; van Leeuwen 2007). Column 15: parallax (error) from HIPPARCOS (reference 5; van Leeuwen et al. 2007). Column 17: parallax (error) from other sources. References: 6 = the parallax for RS Pup is from Kervella et al. (2014) and is a geometric distance based on the light echo seen in the nebula surrounding the star, 7 = based on HST-FGS parallaxes from Benedict et al. (2007), 8 = based on HST-WFC3 parallax from Riess et al. (2014), 9 = based on HST-WFC3 parallaxes from Riess et al. (2018a), 10 = based on HST-FG5 parallax for Polaris B from Bond et al. (2018). Column 19: weighted mean parallax (error) from the sources listed in Col. 20.
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