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Table 1
Physical properties of HIP 17439, cf. discussion in Sect. 2.1.
| Parameter | Value |
|
|
|
| Distance | 16.0 ± 0.1 pc |
| Spectral type, luminosity class | K0 V ... K2 V |
| V, B − V | 6.98, 0.88 mag |
| Abs. magnitude MV, Bol. correction | 5.97, −0.24 |
| Bolometric luminosity, L⋆ | 0.402 L⊙ |
| Effective temperature | 5166 K |
| Surface gravity, log g | 4.44 |
| Radius, R⋆ | 0.80 R⊙ |
| Metallicity, [Fe/H] | 0.05 |
| Rotational velocity, υsini | 2.9 km s-1 |
Activity,  |
−4.534 |
| X-ray luminosity, log LX/L⋆ | −4.9 |
| Mass, M⋆ | 0.63−0.83 M⊙ |
| Age, |
0.76 Gyr |
| Age, log LX/L⋆ | 0.93 Gyr |
| Age, isochrones | 3.7 Gyr |
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