${\mu }_{\alpha }\cos \delta$

[mas/yr]

${\mu }_{\delta }$

[mas/yr]

N

vdB92

−3.41 ± 0.04

1.26 ± 0.04

57 ± 1

vdB146

−2.60 ± 0.04

−3.39 ± 0.07

4 ± 1

vdB150

3.37 ± 0.30

4.40 ± 0.21

7 ± 1