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Table 1

Target characteristics from the Sun in Time programme in Ribas et al. (2005) and Güdel (2007).

d Teff Mass Radius log  Lx Prot Age
Name HD Spectral type (pc) (K) (M) (R) (erg s-1) (days) (Gyr)

EK Dra 129333 G1.5 V 34.0 5870 1.06 0.95 29.93 2.68 0.1
π1 UMa 72905 G1.5 V 14.3 5850 1.03 0.95 29.10 4.90 0.3
χ1 Ori a 39587 G1 V 8.7 5890 1.01 0.96 28.99 5.24 0.3
κ1 Cet 20630 G5 V 9.2 5750 1.02 0.93 28.79 9.21 0.65

Notes.

(a)

χ1Ori has a M-dwarf companion.

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