Open Access
Table 3.
System parameters.
| γ Cep A | ||
|---|---|---|
| Parameter | Value | Description |
| TIC (a) | 367912480 | |
| HD | 222404 | |
| α (J2000) (b) | 23 39 20.59 | Right ascension (RA) |
| δ (J2000) (b) | +77 37 59.25 | Declination (Dec) |
| μα (mas yr−1) (b) | −64.86 ± 0.14 | Proper motion RA |
| μδ (mas yr−1) (b) | 171.16 ± 0.14 | Proper motion Dec |
| ϖ (mas) (b) | 72.52 ± 0.15 | Parallax |
| Dist (pc) (d) | 13.78 ± 0.03 | Distance |
| G(b) | 2.9456 ± 0.031* | Gaia G magnitude |
| LG (L⊙) | 10.48 ± 0.23 | Lum. Gaia G-band |
| V(c) | 3.212 ± 0.008 | TychoV magnitude |
| B − V(c) | 1.028 ± 0.004 | Tycho colour |
| SpT (e) | K1 III-IV | Spectral type |
| Teff (K) (f) | 4806 ± 60 | Effective temperature |
| log g (cgs; dex) (f) | 3.18 | Surface gravity |
| [Fe/H] (dex) (f) | 0.20 ± 0.07 | Metallicity |
| v sin iA (km s−1) (f) | 0.0 ± 0.9 | Projected rotation |
| ζ (km s−1) (f) | 3.77 ± 0.04 | Macro-turbulence |
| ξ (km s−1) (f) | 1.14 ± 0.02 | Micro-turbulence |
Notes. Catalogue IDs, coordinates, magnitudes, spectral type, and spectroscopic parameters.
(d)
Bailer-Jones et al. (2021) (photogeometric).
(*)
Corrected following Riello et al. (2021).
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