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Space Astro
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Info for exoplanet "Stophaë"
| Scientific (actual) data |
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| Name | TOI-421 Ab |
| Planet status | Confirmed |
| Planet mass | 0.0211 |
| Radius | 0.2355 |
| Orbital period | 5.19758 |
| Semi major axis | 0.0554 |
| Orbit eccentricity | 0.13 |
| Inclination | 88.3 |
| Discovered | 2020 |
| Updated | 2025-08-28 |
| Omega | 140 |
| Tzero tr | 2459190 |
| Impact parameter | 0.94 |
| K | 2.83 |
| Temperature (kelvin) | 922 |
| Publication | Published in a refereed paper |
| Detection type | Primary Transit |
| Mass measurement type | Radial Velocity |
| Radius measurement type | Primary Transit |
| Alternate names | BD-14 1137 b, TOI-421.02 |
| Star name | TOI-421 A |
| Right ascension | 81.85° |
| Declination | -14.28° |
| Mag v | 9.93 |
| Mag j | 8.55 |
| Mag h | 8.22 |
| Mag k | 8.07 |
| Star distance | 74.797 |
| Star metallicity | -0.02 |
| Star mass | 0.852 |
| Star radius | 0.871 |
| Star sp type | G9/K0V |
| Star age | 9.4 |
| Star temperature | 5325 |
| Star alternate names | BD-14 1137 |
| Wikipedia article | TOI-421 Ab |
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| Fictional info (?) |
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| Suggested name | Stophaë |
| Planet type | Small hot gas planet |
| The two polar ice caps appear to be made largely of rock.
Because of its rapid rotation, the planet's shape is that of an oblate spheroid (it has a slight but noticeable bulge around the equator). |
| Atmosphere | Hydrogen deuteride (HD) | 99% |
| Nitric oxide | 0.21% |
| 2H2O | 0.087% |
| Carbonyl sulfide | 0.053% |
| Ethane | 0.042% |
| Atmospheric pressure | 1.2 bar |
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| No known satellites |
| Google search for Stophaë |
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Website by Joachim Michaelis
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