Table 1
Stellar parameters of G 264–012 and Gl 393.
| Parameters | G 264–012 | Gl 393 | References |
|---|---|---|---|
| Identifiers | |||
| Name | G 264–012 | Gl 393 | Gic71 / Gli69 |
| Alt. name(s) | NLTT 52122 | BD+01 2447, Ross 446 | Luy79 / Arg1859, Ros26 |
| Karmn | J21466+668 | J10289+008 | Cab16a |
| Coordinates, basic photometry, and spectral type | |||
| α (J2000) | 21:46:41.25 | 10:28:54.91 | Gaia EDR3 |
| δ (J2000) | +66:48:12.1 | +00:50:15.9 | Gaia EDR3 |
| G (mag) | 11.7531 ± 0.0028 | 8.6760 ± 0.0028 | Gaia EDR3 |
| J (mag) | 8.837 ± 0.021 | 6.176 ± 0.021 | 2MASS |
| Spectral type | M4.0 V | M2.0 V | AF15 |
| Distance and kinematics | |||
| d (pc) | 15.986 ± 0.010 | 7.0375 ± 0.0025 | Gaia EDR3 |
| μα cosδ (mas a−1) | 392.47 ± 0.071 | − 602.992 ± 0.024 | Gaia EDR3 |
| μα (mas a−1) | 206.812 ± 0.062 | − 731.882 ± 0.021 | Gaia EDR3 |
| γ (km s−1) | − 9.771 ± 0.024 | + 8.005 ± 0.023 | Laf20 |
| U (km s−1) | − 29.238 ± 0.018 | − 7.27 ± 0.01 | This work |
| V (km s−1) | − 17.089 ± 0.023 | − 27.79 ± 0.02 | This work |
| W (km s−1) | − 9.164 ± 0.016 | − 15.45 ± 0.02 | This work |
| Photospheric parameters | |||
| Teff (K) | 3326 ± 54 | 3579 ± 51 | Pas19 |
| logg [cgs] | 4.85 ± 0.06 | 4.88 ± 0.07 | Pas19 |
| [Fe∕H] (dex) | + 0.10 ± 0.19 | − 0.09 ± 0.16 | Pas19 |
| Physical parameters | |||
| L (L⊙) | 0.01066 ± 0.00011 | 0.02687 ± 0.00054 | Schw19 |
| R (R⊙) | 0.305 ± 0.011 | 0.426 ± 0.013 | Schw19 |
| M (M⊙) | 0.297 ± 0.024 | 0.426 ± 0.017 | Schw19 |
| Rotation and activity | |||
| vsini (km s−1) | ≤2.0 | ≤2.0 | Rein18 |
| Prot (d) | 100 ± 6 |  |
This work |
| pEW(Hα) (Å) | + 0.077 ± 0.009 | − 0.005 ± 0.007 | Schö19 |
 |
... | − 4.91 ± 0.06 | This work |
| log LX (erg s−1 cm−2) | ... |  |
This work |
References. 2MASS: Skrutskie et al. (2006); Arg1859: Argelander (1859); AF15: Alonso-Floriano et al. (2015); Cab16a: Caballero et al. (2016) Gaia EDR3: Gaia Collaboration (2020); Gic71: Giclas et al. (1971); Gli69: Gliese (1969); Laf20: Lafarga et al. (2020); Luy79: Luyten (1979); New16: Newton et al. (2016); Pas19: Passegger et al. (2019); Rein18: Reiners et al. (2018); Ros26: Ross (1926); Schö19: Schöfer et al. (2019); Schw19: Schweitzer et al. (2019).
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