Table 1: Program stars and their basic stellar parameters.

Obj(BS/HD)		 Sp. type $T_{\rm eff}^{a}$ $M_{\rm bol}^{b}$ ${\rm Mass}^{c}$
    K  mag $M_{\odot }$

$\alpha $ Tau (1457)		 K5+III 3874 -1.7 $\pm$ 0.2 1.5 $\pm$ 0.3
$\delta $ Oph (6056) M0.5III 3790 -2.2 $\pm$ 0.3 1.6 $\pm$ 0.3
$\nu $ Vir (4517) M1III 3812 -2.2 $\pm$ 0.4 1.7 $\pm$ 0.4
$\alpha $ Cet (911) M1.5IIIa 3909 -3.2 $\pm$ 0.3 3.6 $\pm$ 0.4
$\sigma $ Lib (5603) M2.5III 3596 -3.4 $\pm$ 0.5 2.2 $\pm$ 0.5
$\lambda $ Aqr (8698) M2.5III 3852 -3.4 $\pm$ 0.7 3.7 $\pm$ 1.2
$\beta $ Peg (8775) M2.5II-III 3603 -3.3 $\pm$ 0.2 2.2 $\pm$ 0.3
$\tau ^4$ Eri (1003) M3+IIIa 3712 -2.9 $\pm$ 0.4 2.0 $\pm$ 0.4
$\mu $ Gem (2286) M3III 3643 -3.3 $\pm$ 0.3 2.3 $\pm$ 0.5
$\delta $ Vir (4910) M3III 3643 -2.4 $\pm$ 0.3 1.4 $\pm$ 0.3
10 Dra (5226) M3.5III 3730 -2.9 $\pm$ 0.3 2.1 $\pm$ 0.4
$\rho $ Per (921) M4II 3523 -4.1 $\pm$ 0.4 3.2 $\pm$ 0.5
BS6861 (6861) M4 3600 -5.2 $\pm$ 2.0 6.3 $\pm$ 4.0
$\delta ^{2}$ Lyr (7139) M4II 3420 -5.5 $\pm$ 0.8 5.5 $\pm$ 2.0
RR UMi (5589) M4.5III 3397 -3.4 $\pm$ 0.3 1.6 $\pm$ 0.3
$\alpha $ Her (6406) M5Ib-II 3293 -5.8 $\pm$ 1.6 5.0 $\pm$ 2.0
OP Her (6702) M5II 3325 -4.4 $\pm$ 0.8 2.3 $\pm$ 1.0
XY Lyr (7009) M5II 3300 -5.1 $\pm$ 1.1 3.7 $\pm$ 1.5
R Lyr (7157) M5III 3313 -4.3 $\pm$ 0.3 2.1 $\pm$ 0.5
RZ Ari (867) M6III 3341 -3.5 $\pm$ 0.6 1.5 $\pm$ 0.4
30g Her (6146) M6-III 3298 -4.2 $\pm$ 0.4 2.0 $\pm$ 0.6
SW Vir (114961) M7-III: 2886 -4.4 $\pm$ 0.9 1.3 $\pm$ 0.3
RX Boo (126327) M7.5-8 2850 -4.6 $\pm$ 0.8 1.3 $\pm$ 0.3
a Based on the infrared flux method. The uncertainty in  $T_{\rm eff}$ for individual objects is estimated to be $\pm$100 K; b based on the Hipparcos trigonometric parallaxes and measured bolometric fluxes; c based on the evolutionary tracks of Fig. 1.


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