Table 1: Adopted limits of target selection as a function of angular separation.

Limit
$\rho \leq 1.5'' $ $\rho \leq 5'' $ $\rho \leq 12'' $ $\rho > 12''$
$\Delta \rho$/$\rho$ (%) 55 20 8 10
Absolute 0.8 $^{\prime\prime}$ 1.0 $^{\prime\prime}$ 1.0 $^{\prime\prime}$ >1.5 $^{\prime\prime}$


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