Table 1
Parameters of the exoplanet system HD 209458.
| Parameter | Value | Reference |
|---|---|---|
| α [J2000] | 22:03:10.77 | 1 |
| δ [J2000] | +18:53:03.5 | 1 |
| d | 48.37 (12) pc | 1 |
| V | 7.63 (1) mag | 2 |
| J | 6.59 (2) mag | 3 |
| vsys | –14.7652 (16) km s−1 | 4 |
| K⋆ | 84.67 (70) m s−1 | 5 |
| R⋆ | 1.155 R⊙ |
5 |
| M⋆ | 1.119 (33) M⊙ | 5 |
| Teff | 6065 (50) K | 5 |
| FXUV (a) | 1.004 (284) W m−2 | 6 |
| Porb | 3.52474859 (38) d | 7 |
| T0 [HJD] | 2 452 826.628521 (87) d | 7 |
| td | 183.89 (3.17) min | 8 |
| i | 86.71 (5) deg | 5 |
| a | 0.04707 au |
5 |
| ecosω | 0.00004 (33) | 9 |
| RP | 1.359  RJ |
5 |
| MP | 0.685  MJ |
5 |
| gP | 9.18 (1) m s−2 | 5 |
| Teq | 1449 (12) K | 5 |
| KP (b) | 144.9 km s−1 |
6 |
Notes. (a) X-ray and EUV (5–504 Å) flux at the distance of the planet’s semi-major axis, derived from coronal models. (b) Derived from orbital parameters.
References. (1) Gaia Collaboration (2018), (2) Høg et al. (2000), (3) Skrutskie et al. (2006), (4) Mazeh et al. (2000), (5) Torres et al. (2008), (6) this work, (7) Knutson et al. (2007), (8) Wright et al. (2011), (9) Crossfield et al. (2012).
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