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Table 1

Relative astrometric position of the binary companion HD 196885 B to the exoplanet host star HD 196885 A.

UT Date Filter/Obj Δα Δδ ΔKs Plate scale True north
(mas) (mas) (mag) (mas) (o)

01/08/2005 Ks/S27 658.5 ± 1.7 273.6 ± 1.6 3.08 ± 0.05 27.01 ± 0.05 0.09 ± 0.12
26/08/2006 Ks/S27 649.8 ± 1.9 292.6 ± 2.4 3.06 ± 0.04 27.01 ± 0.05 0.02 ± 0.20
25/08/2007 Ks/S27 640.2 ± 3.1 309.7 ± 3.2 3.07 ± 0.06 27.01 ± 0.05 0.05 ± 0.15
28/06/2008 Ks/S27 630.9 ± 3.1 326.3 ± 3.2 3.00 ± 0.10 27.01 ± 0.05  −0.25 ± 0.14
27/08/2009 Ks/S27 614.5 ± 3.0 342.1 ± 2.9 3.14 ± 0.09 27.01 ± 0.05  −0.35 ± 0.08

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