**Table 2:** System and stellar parameters for $\zeta$ And.
Parameter	Value
Classification	K1 III + K V
Period^a, ( $P_{\rm orb}=P_{\rm rot}$ ) [days]	17.769426 $\pm$ 0.000040
Eccentricity, e	0.0
Inclination, i [ $^\circ$ ]	65 $\pm$ 5
$v\sin i$ [km s^-1]	41.4 $\pm$ 0.2
$a_1\sin i$ ^a [km]	6.14 10⁶
a=a₁+a₂ [km]	3 10⁷ (2.7 $R_\star$ )
f(m)^a	0.0292
Mass ratio q (adopted)^b	0.29
M₁ [ $M_{\odot }$ ]	2.6 $\pm$ 0.4
M₂ [ $M_{\odot }$ ] (adopted)	$\approx$ 0.75
R₁ [ $R_\odot$ ]	16.0 $\pm$ 0.2
Non-sphericity, $\epsilon$ (Eq. (2))	0.27 $\pm$ 0.04
$\log g$	2.8 $\pm$ 0.5
$T_{\rm eff}$ [K]	4600 $\pm$ 100
$(B-V)_{\rm Hipparcos}$ [mag]	1.100 $\pm$ 0.004
$(V-I)_{\rm Hipparcos}$ [mag]	1.06 $\pm$ 0.01
Distance $_{\rm Hipparcos}$ [pc]	55.6 $\pm$ 2.7
Microturbulence, $\xi$ [km s^-1 ]	1.0
Macroturbulence, $\zeta_{\rm R,T}$ [km s^-1]	2.0
$\rm [Fe/H]/[Fe/H]_\odot$	$-0.30\pm0.05$
$\rm [Ca/H]/[Ca/H]_\odot$	$-0.40\pm0.05$
$\log N$ (Li) [H = 12]	1.24 $\pm$ 0.06

^a Fekel et al. (1999).
^b Stawikowski & Glebocki (1994).