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Table 1
Stellar parameters for HD 81817.
| Parameter | HD 81817 | Ref. | |
|---|---|---|---|
| Spectral type | K3 III | hipparcos (ESA 1997) | |
| mv | [mag] | 4.426 ± 0.001 | van Leeuwen (2007) |
| B − V | [mag] | 1.488 ± 0.001 | van Leeuwen (2007) |
| π | [mas] | 3.72 ± 0.29 | Gaia Collaboration (2018) |
| [Fe∕H] | [dex] | − 0.17 ± 0.1 | This work |
| 0.09 | Soubiran et al. (2016) | ||
| Teff | [K] | 4140 ± 55 | This work |
| log g | [cgs] | 1.3 ± 0.2 | This work |
| vmicro | [km s−1] | 2.3 ± 0.2 | This work |
| L⋆ | [L⊙] | 1822.9 | This work |
| M⋆ | [M⊙] | 4.3 ± 0.5 | This work |
| R⋆ | [R⊙] | 83.8 ± 7.8 | This work |
| Age | [Gyr] | 0.15 ± 0.04 | This work |
| vrot sin i | [km s−1] | 4.7 ± 0.1 | This work |
| 4.9 | Gȩbocki & Gnaciński (2005) | ||
| 5.5 ± 0.1 | de Medeiros & Mayor (1999) | ||
| Prot/sin i | [days] | 801 ~ 1008 | This work |
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