Table 1
Stellar properties of K2-157 compiled from the literature and derived in this work (Sect. 3).
| Parameter | Value | Reference |
|---|---|---|
| Identifiers | ||
| K2 | 157 | (1) |
| EPIC | 201130233 | (2) |
| TIC | 349445372 | (3) |
| UCAC4 | 422-055378 | (4) |
| Gaia DR3 | 3596333042162818304 | (5) |
| Astrometric properties | ||
| RA, Dec | 12:15:00.36, –5:46:55.27 | (5) |
| μα (mas yr–1) | 36.683 ± 0.017 | (5) |
| μδ (mas yr–1) | –7.522 ± 0.012 | (5) |
| Parallax (mas) | 3.446 ± 0.015 | (5) |
| RV (kms–1) | 44.5 ± 1.4 | (5) |
| Atmospheric parameters and spectral type | ||
| Teff (K) | 5334 ± 64 | (6) |
| log g (cgs) | 4.45 ± 0.04 | (6) |
| [Fe/H] (dex) | 0.02 ± 0.04 | (6) |
| ξt (kms–1) | 0.73 ± 0.04 | (6) |
| SpT | G9 V | (6) |
| Physical parameters | ||
| R★ (R⊙) | 0.860 ± 0.019 | (6) |
| M★ (M⊙) | 0.890 ± 0.029 | (6) |
| Age (Ga) | 8.8 ± 4.0 | (6) |
| v sin i★ (kms–1) | <3 | (6) |
 |
–5.077 ± 0.049 | (6) |
 |
 |
(6) |
| Chemical abundances | ||
| [Mg/H] (dex) | 0.07 ± 0.05 | (6) |
| [Si/H] (dex) | 0.05 ± 0.05 | (6) |
| Photometric properties | ||
| V (mag) | 12.792 ± 0.057 | (7) |
| B (mag) | 13.597 ± 0.049 | (7) |
| g’ (mag) | 13.160 ± 0.006 | (7) |
| r’ (mag) | 12.579 ± 0.012 | (7) |
| i’ (mag) | 12.387 ± 0.018 | (7) |
| z’ (mag) | 12.367 ± 0.061 | (7) |
| J (mag) | 11.398 ± 0.022 | (8) |
| H (mag) | 11.023 ± 0.022 | (8) |
| Ks (mag) | 10.980 ± 0.023 | (8) |
| Galactic space velocities and membership | ||
| ULSR(††) (kms–1) | –66.89 ± 0.31 | (6) |
| VLSR(††) (kms–1) | 5.15 ± 0.74 | (6) |
| WLSR(††) (kms–1) | 45.65 ± 1.14 | (6) |
| Gal. population(††) | Thin disc (54%) | (6) |
Notes. (†) 
was obtained by fitting a sinusoidal model to the Hα activity index (Δ𝒵 = +2.2; Sect. 4.3), and it is compatible with the Prot estimated from empirical 
relations (Sect. 3.2). (††) UVW are referred to the local standard of rest from Schönrich et al. (2010), and the probability is based on the prescription by Bensby et al. (2014). (1) Mayo et al. (2018); (2) Huber et al. (2016); (3) Stassun et al. (2018); (4) Zacharias et al. (2013); (5) Gaia Collaboration (2023); (6) This work; (7) Henden et al. (2016); (8) Skrutskie et al. (2006).
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