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Table 2
Stellar parameters of LTT 3780.
| Parameter | Value | Reference |
|---|---|---|
| Name and identifiers | ||
| Name | LTT 3470 | Luyten (1957) |
| G 162–44 | Giclas et al. (1971) | |
| Karmn | J10185–117 | Caballero et al. (2016) |
| TOI | 732 | TESS Alerts |
| TIC | 36 724 087 | Stassun et al. (2018) |
| Coordinates and spectral type | ||
| α (J2015.5) | 10:18:34.77 | Gaia DR2 |
| δ (J2015.5) | –11:43:04.1 | Gaia DR2 |
| Sp. type | M3.5 V | Reid et al. (2003) |
| Magnitudes | ||
| B (mag) | 14.68 ± 0.04 | UCAC4 |
| g (mag) | 13.84 ± 0.05 | UCAC4 |
| GBP (mag) | 13.352 ± 0.004 | Gaia DR2 |
| V (mag) | 13.14 ± 0.04 | UCAC4 |
| r (mag) | 12.55 ± 0.05 | UCAC4 |
| G (mag) | 11.8465 ± 0.0005 | Gaia DR2 |
| i (mag) | 11.09 ± 0.08 | UCAC4 |
| GRP (mag) | 10.6583 ± 0.0016 | Gaia DR2 |
| J (mag) | 9.01 ± 0.03 | 2MASS |
| H (mag) | 8.44 ± 0.06 | 2MASS |
| Ks (mag) | 8.20 ± 0.02 | 2MASS |
| W1 (mag) | 8.04 ± 0.02 | AllWISE |
| W2 (mag) | 7.880 ± 0.019 | AllWISE |
| W3 (mag) | 7.771 ± 0.019 | AllWISE |
| W4 (mag) | 7.58 ± 0.17 | AllWISE |
| Parallax and kinematics | ||
| π (mas) | 45.46 ± 0.08 | Gaia DR2 |
| d (pc) | 22.00 ± 0.04 | Gaia DR2 |
| μα cosδ (mas yr−1) | − 341.411 ± 0.11 | Gaia DR2 |
| μδ (mas yr−1) | − 247.87 ± 0.10 | Gaia DR2 |
| Vr (km s−1) | − 0.44 ± 0.09 | Jeffers et al. (2018) |
| U(km s−1) | − 14.89 ± 0.06 | This work |
| V (km s−1) | − 22.00 ± 0.08 | This work |
| W(km s−1) | − 35.08 ± 0.07 | This work |
| Galactic population | Thin disc | This work |
| Photospheric parameters | ||
| Teff (K) | 3360 ± 51 | This work |
| log g | 4.81 ± 0.04 | This work |
| [Fe/H] | + 0.09 ± 0.16 | This work |
| v sin i⋆ (km s−1) | <3.0 | Jeffers et al. (2018) |
| Physical parameters | ||
| L(10−4 L⊙) | 167 ± 3 | This work |
| R(R⊙) | 0.382 ± 0.012 | This work |
| M(M⊙) | 0.379 ± 0.016 | This work |
| ρ (g cm−3) | 9.6 ± 1.0 | This work |
References. 2MASS: Skrutskie et al. (2006); AllWISE: Cutri & et al. (2013); Gaia DR2: Gaia Collaboration (2018); UCAC4: Zacharias et al. (2013).
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