Table 1
Stellar parameters for Gl 581 and Proxima compiled from the literature.
| Gl 581 | Proxima | |||
|---|---|---|---|---|
| Parameter | Value | Ref. | Value | Ref. |
| V (mag) | 10.560 ± 0.02 | 1 | 11.13 | 2 |
| J (mag) | 6.706 ± 0.026 | 3 | 5.357 ± 0.023 | 3 |
| RA (J2000) | 15 1926.83 | 4 | 14 2942.95 | 4 |
| Dec (J2000) | −07 43 20.2 | 4 | −62 40 46.2 | 4 |
| μα cos δ (mas/yr) | −1221.278 | 4 | −3781.741 | 4 |
| μδ (mas/yr) | −97.229 | 4 | −20.578 | 4 |
| Parallax (mas) | 158.718 ± 0.030 | 4 | 768.067 ± 0.050 | 4 |
| Distance (pc) | 6.3005 ± 0.0012 | 4 | 1.3012 ± 0.0003 | 4 |
| Spectral Type | M3.0 V | 5 | M 5.5 V | 6 |
| L⋆ (L⊙) | 0.01237 ± 0.00007 | 8 | 0.0016 ± 0.0006 | 4 |
| Teff (K) | 3367 ± 91 | 11 | 2900 ± 100 | 15 |
| Fe/H | −0.21 ± 0.11 | 11 | −0.18 ± 0.11 | 11 |
| M⋆ (M⊙) | 0.295 ± 0.010 | 12 | 0.1221 ± 0.0022 | 9 |
| R⋆ (R⊙) | 0.302 ± 0.005 | 12 | 0.141 ± 0.021 | 7 |
| Prot (days) | 132.5 ± 6.3 | 13 | 83.2 ± 1.6 | 10 |
| Pcycle (days) | ~1400 | 14 | 6560 ± 85 | 10 |
Notes. References for the provided values: 1 – Zacharias et al. (2013); 2 – (Jao et al. 2014); 3 – (Cutri et al. 2003); 4 – Gaia Collaboration (2016); 5 – Reid et al. (1995); 6 – Bessell (1991); 7 – Boyajian et al. (2012); 8 – Cifuentes (2023); 9 – Mann et al. (2015); 10 – Suárez Mascareño et al. (2025); 11 – Antoniadis-Karnavas et al. (2024); 12 – von Stauffenberg et al. (2024); 13 – Suárez Mascareño et al. (2015); 14 – Gomes da Silva et al. (2012); 15 – Pavlenko et al. (2017).
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