Table 2: Astrometry of PKS 1830-211. All positions are given relative to the quasar Image A along with their 1-$\sigma $ error bars. The measurements have been transformed to match the coordinate system of NICMOS (Lehár et al. 2000), by using 8 stars common to the AO and NICMOS fields of view.
Object X Y
  (arcsec) (arcsec)
Quasar A 0.0 0.0
Quasar B $+0.649\pm 0.001 $ $-0.724\pm 0.001$
Star P $+0.333\pm 0.002 $ $-0.504\pm 0.002$
Lens G $+0.498\pm 0.004 $ $-0.456\pm 0.004$


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