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Table 2
RSE of the errors in the astrometric parameters and of the normalized errors (i.e., after division by the formal standard deviations) for different magnitude ranges. See text for further explanations.
| Magnitude range | No. stars | RSE of error [μas and μas yr-1] | ϱ = RSE of normalized error [unitless] | ||||||||||
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| α ∗ | δ | ϖ | μα ∗ | μδ | α ∗ | δ | ϖ | μα ∗ | μδ | ||||
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| G < 13 | 18 253 | 6.6 | 5.7 | 7.5 | 4.5 | 4.0 | 1.507 | 1.470 | 1.369 | 1.443 | 1.425 | ||
| 13 ≤ G < 15 | 70 355 | 12.4 | 10.6 | 14.9 | 8.7 | 7.5 | 1.112 | 1.100 | 1.082 | 1.098 | 1.100 | ||
| 15 ≤ G < 16 | 88 116 | 20.2 | 17.3 | 24.9 | 14.3 | 12.3 | 1.024 | 1.024 | 1.022 | 1.032 | 1.024 | ||
| 16 ≤ G < 17 | 151 639 | 30.8 | 26.7 | 38.4 | 21.8 | 19.0 | 1.010 | 1.010 | 1.010 | 1.014 | 1.008 | ||
| 17 ≤ G < 18 | 272 424 | 49.4 | 42.8 | 61.8 | 34.8 | 30.4 | 1.004 | 1.006 | 1.003 | 1.002 | 1.003 | ||
| 18 ≤ G < 19 | 489 253 | 83.3 | 70.7 | 104.1 | 58.9 | 50.8 | 1.001 | 1.001 | 1.002 | 1.003 | 1.002 | ||
| 19 ≤ G | 1 166 182 | 167.9 | 140.0 | 207.6 | 118.5 | 100.2 | 1.001 | 1.000 | 1.000 | 1.001 | 1.000 | ||
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| all G | 2 256 222 | 116.8 | 98.7 | 145.6 | 82.4 | 70.6 | 1.009 | 1.009 | 1.007 | 1.009 | 1.008 | ||
Notes. The asterisk in α ∗ indicates that the errors are true arcs on the sky; cf. footnote 11.
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