Table 1
Stellar properties for TOI-402.
| Property | Value | Reference |
|---|---|---|
| Names | ||
| TOI | TOI-402 | TESS |
| TIC ID | 120 896 927 | TESS |
| HD | 15 337 | – |
| 2MASS ID | J02272838-2738064 | 2MASS |
| Gaia ID DR2 | 5068777809824976256 | Gaia |
| Astrometric properties | ||
| Parallax (mas) | 22.2918 ± 0.0349 | Gaia(a) |
| Distance (pc) | 44.86 ± 0.07 | Gaia(a) |
| Photometric properties | ||
| B–V | 0.86 | Tycho |
| B (mag) | 9.95 ± 0.03 | Tycho |
| V (mag) | 9.09 ± 0.02 | Tycho |
| G (mag) | 8.8560 ± 0.0002 | Gaia |
| T (mag) | 8.27 ± 0.02 | TESS |
| J (mag) | 7.55 ± 0.02 | 2MASS |
| H (mag) | 7.22 ± 0.04 | 2MASS |
| Ks (mag) | 7.04 ± 0.02 | 2MASS |
| W1 (mag) | 6.92 ± 0.05 | WISE |
| W2 (mag) | 7.05 ± 0.02 | WISE |
| W3 (mag) | 7.01 ± 0.02 | WISE |
| W4 (mag) | 6.92 ± 0.07 | WISE |
| Spectroscopic properties | ||
| Spectral type | K1V | Houk & Fuentes-Williams (1982) |
| Teff (K) | 5131 ± 74 | See Sect. 3.1 |
| logg | 4.37 ± 0.13 | See Sect. 3.1 |
| ξt | 0.87 ± 0.13 | See Sect. 3.1 |
| [Fe/H] | 0.03 ± 0.04 | See Sect. 3.1 |
| [NaI/H] | 0.12 ± 0.08 | See Sect. 3.1 |
| [MgI/H] | 0.10 ± 0.07 | See Sect. 3.1 |
| [AlI/H] | 0.11 ± 0.06 | See Sect. 3.1 |
| [SiI/H] | 0.05 ± 0.07 | See Sect. 3.1 |
| [CaI/H ] | −0.03 ± 0.10 | See Sect. 3.1 |
| [ScII/H ] | 0.04 ± 0.08 | See Sect. 3.1 |
| [TiI/H ] | 0.10 ± 0.10 | See Sect. 3.1 |
| [CrI/H ] | 0.05 ± 0.08 | See Sect. 3.1 |
| [NiI/H ] | 0.07 ± 0.04 | See Sect. 3.1 |
| Bulk properties | ||
| Mass (M⊙) | 0.851 (4.9%) |
See Sect. 3.2 |
| Radius (R⊙) | 0.839 |
See Sect. 3.2 |
| Luminosity (L⊙) | 0.472 |
See Sect. 3.2 |
| Age (Gyr) | 7.5 |
See Sect. 3.2 |
| Activity | ||
⟨  ⟩ |
−4.91 | See Sect. 3.3 |
| Prot (days) | 36.55 | See Sect. 3.3 |
Notes. (a)For completeness, we adjusted the parallax by +0.07 mas based on the systematic offsets reported by Stassun & Torres (2018) and by Zinn et al. (2019). Both studies find the Gaia DR2 parallaxes to be too small by 0.06 ~ 0.08 mas from benchmark eclipsing binary and asteroseismic stars within ~1 kpc.
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