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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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