Open Access
Table 1
Proxima and Proxima b properties.
| Proxima Centauri | Value | ref |
|---|---|---|
| Right ascension | 14 : 29 : 42.946132 | 1 |
| Declination | −62 : 40 : 46.16468 | 1 |
| Distance from Earth | d = 1.3012 ± 0.0003 pc | 1 |
| Mass | Ms = 0.1221 ± 0.0022 M⊙ | 2 |
| Radius | R⋆ = 0.141 ± 0.021 R⊙ | 3 |
| I-band magnitude | I = 7.4 | 7 |
| Rotational period | Prot = 83.1 ± 1.4 d | 4 |
| PHOENIX model | ||
| Teff = 3000 K | 5 | |
| log (g) = 5 | 6 | |
| [Fe/H] = 0 | 6 | |
| [α/M] = 0 | 6 | |
| Proxima b | Value | |
| T0 − 2 450 000 d | T0 = 10548.59 ± 0.12 d | 4 |
| Minimum mass | Mp sin i = 1.055 ± 0.055 M⊕ | 4 |
| Orbital period [P] | P = 11.18465 ± 0.00053 d | 4 |
| Semi-major axis | a = 0.04848 ± 0.00029 AU | 4 |
| Eccentricity | e = 0 (fixed) | 4 |
| RV amplitude | Ks = 1.226 ± 0.062 m/s | 4 |
Notes. References: 1-Gaia Collaboration (2021), 2- Mann et al. (2015), 3- Boyajian et al. (2012), 4- Suárez Mascareño et al. (2025) (T0 is the time of inferior conjunction), 5- Turbet et al. (2016), 6- Husser et al. (2013), 7-Ribas et al. (2017).
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