| Scientific (actual) data |
|---|
| Planet | HD 209458 b |
| Planet status | Confirmed |
| Planet mass | 0.69 |
| Radius | 1.38 |
| Orbital period | 3.52472 |
| Semi major axis | 0.04747 |
| Orbit eccentricity | 0.0082 |
| Inclination | 86.59 |
| Angular distance | 0.00101 |
| Discovered | 1999 |
| Updated | 2023-08-02 |
| Omega | 43.8 |
| Tperi | 2452970 |
| Tzero tr | 2453340 |
| K | 84.3 |
| Publication | Published in a refereed paper |
| Detection type | Radial Velocity |
| Mass detection type | Radial Velocity |
| Radius detection type | Primary Transit |
| Molecules | C, C2H2, CH4, CO, CO2, Ca, Fe, Fe+, H, H2, H2O, HCN, He, K, Mg, Mn, NH3, Na, O I, O2, Sc, TiO, V, VO |
| Star name | HD 209458 |
| Right ascension | 330.79° |
| Declination | 18.88° |
| Mag v | 7.65 |
| Star distance | 47 |
| Star metallicity | 0.02 |
| Star mass | 1.148 |
| Star radius | 1.203 |
| Star sp type | G0 V |
| Star age | 4 |
| Star temperature | 6092 |
| Wikipedia article | HD 209458 b |
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| Fictional info (?) |
|---|
| Suggested name | Kasiegir-an |
| Planet type | Hot gas giant |
| The planet is named after the deity Kasiegir-an, the demon of war.
The polar regions are constantly below 243°K (-30°C). |
| Atmosphere | I, | 12% |
| HCN, | 11% |
| NH3, | 11% |
| Fe, | 11% |
| CO, | 8.6% |
| Mn, | 7.9% |
| C, | 7.7% |
| Ca, | 6.2% |
| TiO, | 5.3% |
| V, | 5.3% |
| VO | 5.3% |
| Na, | 4.7% |
| O2, | 1.2% |
| H2O, | 1.2% |
| CO2, | 1% |
| Fe+, | 0.22% |
| Sc, | 0.12% |
| CH4, | 0.06% |
| H2, | 0.03% |
| H, | 0.03% |
| C2H2, | 0.03% |
| Mg, | 0.017% |
| K, | 0.00046% |
| O | 2.7E-5% |
| He, | 8.0E-6% |
| Atmospheric pressure | 30 bar |
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| No known satellites |
| Google search for Kasiegir-an |
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