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Space Astro
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Info for exoplanet "Steph'che"
| Scientific (actual) data |
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| Name | TOI-421 Ac |
| Planet status | Confirmed |
| Planet mass | 0.0444 |
| Radius | 0.4541 |
| Orbital period | 16.0675 |
| Semi major axis | 0.117 |
| Orbit eccentricity | 0.19 |
| Inclination | 85.6 |
| Discovered | 2020 |
| Updated | 2024-07-30 |
| Omega | 102 |
| Tzero tr | 2459200 |
| Impact parameter | 0.7 |
| K | 4.1 |
| Temperature (kelvin) | 635 |
| 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 c, TOI-421.01 |
| 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 Ac |
Back
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| Fictional info (?) |
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| Suggested name | Steph'che |
| Planet type | Terrestrial |
| As seen from TOI-421 A, in a frame of reference that rotates with the orbital motion, it appears to rotate only once every two years.
The outer atmosphere is visibly segregated into several bands at different latitudes, resulting in turbulence and storms along their interacting boundaries. |
| Atmosphere | Hydrogen peroxide | 64% |
| Ethane | 18% |
| Carbon monoxide | 8.3% |
| Helium | 3.3% |
| Sulfur dioxide | 3.2% |
| Methane | 1.8% |
| Hydrogen deuteride (HD) | 0.67% |
| Atmospheric pressure | 0.17 bar |
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| No known satellites |
| Google search for Steph'che |
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Website by Joachim Michaelis
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