Table 2: Properties of the eight RS CVn systems.
System Spectral Types Massesa $P_{\rm orb}^{b}$ $P_{\rm rot}^{c}$ Eccentricity id Eclipse Distance
    ($M_{\odot}$) (days) (days)   ($^{\circ}$)   (pc)
HD 8357e G7 Ve / K1 IVe 0.92 / 1.12 14.3023e 12.245 0.185e 30e none 45
EI Eri G5 IV / ? $\geq$1.4 / $\geq$0.53 1.947227 1.945 0.0 46 none 56
DM UMa K0-1 IV-III / ? f(m)=0.011 7.4949 7.478 0.02 $\approx$40 none 139
${\sigma ^{2}}$ CrB F6 V / G0 V 1.12 / 1.14 1.139791 1.1687 0.022 28 none 22
HD 8358 G5 / G5 $\geq$0.9 / $\geq$0.8 0.515782 0.52006 0.0 $\approx$30 none 66
ER Vul G0 V / G5 V 1.10 / 1.05 0.698095 0.6942 0.0 67 partial 50
AY Cet WD / G5 III 0.55 / 2.09 56.824 77.22 0.0 26 none 79
RS CVn F4 IV / G9 IV 1.41 / 1.44 4.79785 4.7912 0.0 87 total 108
a Masses are given in the same order as for spectral types, where f(m) indicates that the mass function is given.
b Orbital period.
c Rotation (photometric) period.
d Inclination of the pole of the orbital plane or of the rotation axis.
e Data from Fekel (1996).

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