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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

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