Table 1
Stellar parameters of HD 207496.
| Parameter | Value and uncertainty |
|---|---|
| RAGaia-CRF2(hh:mm:ss.ssss) | 21:54:52.40 |
| DecGaia-CRF2 (dd:mm:ss.ss) | −77:20:19.78 |
| G mag | 7.9836 ± 0.0028 |
| K mag(•) | 5.967 ± 0.026 |
| H mag (•) | 6.085 ± 0.023 |
| J mag(•) | 6.570 ± 0.023 |
| Effective temperature Teff (K)] | 4819 ± 94 |
| Surface gravity log g (g cm−2) | 4.4 ± 0.21 |
| Surface gravity log g(1) (g cm−2) | 4.507 ± 0.04 |
| Microturbulence (m s−1) | 0.62 ± 0.19 |
| Iron abundance [Fe/H] (dex) | 0.095 ± 0.038 |
| Magnesium abundance [Mg/H] (dex) | 0.06 ± 0.09 |
| Silicon abundance [Si/H] (dex) | 0.11 ± 0.07 |
| Carbon abundance [C/H](2) (dex) | 0.01 ± 0.12 |
| Oxygen abundance [O/H](2) (dex) | 0.07 ± 0.11 |
log  |
−4.457 ± 0.053 |
| Spectral type | K2.5V |
| Parallax(*) p (mas) | 42.2929703 ± 0.018 |
| Distance to Earth(*) d (pc) | 23.63825230 ± 0.012 |
| Stellar mass M⋆ (M⊙) | 0.80 ± 0.04 |
| Stellar radius R⋆ (R⊙) | 0.769 ± 0.026 |
| Stellar density ρ⋆ (p⊙) | 1.77 ± 0.20 |
| Stellar age τ (Gyr) | 0.52 ± 0.26 |
| Stellar rotation PRot (days) | 12.36 ± 0.12 |
Notes. (*)Parallax from Gaia EDR3 (Gaia Collaboration 2021) using the formulation of Lindegren et al. (2021). Distance from Bailer-Jones et al. (2021).(•) B and V magnitudes from Høg et al. (2000) and K, H, and J from Cutri et al. (2003).(1) Trigonometric surface gravity derived using the Gaia eDR3 parallaxes (Gaia Collaboration 2021).(2) The carbon and oxygen abundance have been estimated using a random forest machine learning method which uses Fe and Mg abundances as input.
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