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Space Astro
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Info for exoplanet "Steph"
| Scientific (actual) data |
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| Planet | HD 165131 b |
| Planet status | Confirmed |
| Planet mass | 19 |
| Orbital period | 2343 |
| Semi major axis | 3.59 |
| Orbit eccentricity | 0.67 |
| Inclination | 93 |
| Discovered | 2023 |
| Updated | 2023-08-11 |
| Omega | 3.1 |
| Publication | Published in a refereed paper |
| Detection type | Radial Velocity |
| Mass detection type | Radial Velocity |
| Star name | HD 165131 |
| Right ascension | 271.35° |
| Declination | -21.67° |
| Mag v | 8.4 |
| Star distance | 57.4263 |
| Star metallicity | 0.06 |
| Star mass | 1.06 |
| Star radius | 1.06 |
| Star temperature | 5870 |
| Wikipedia article | HD 165131 b |
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| Fictional info (?) |
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| Suggested name | Steph |
| Planet type | Huge cold gas giant |
| For this reason, scientists often classify Steph and Tomal Sienus as "huge cold gas giants" to distinguish them from the other planets. This planet is named after the deity Steph, the messenger of chaos.
Two spacecraft have visited Steph: Frontier 3 flew by 23 years ago; and Messenger, launched 25 years ago, orbited Steph over 70 times in four years before exhausting its plasma drive and crashing into the planet's atmosphere 11 years later.
It may have had helium oceans in the past, but these would have vaporized as the temperature rose due to a runaway greenhouse effect.
It was the one of the first exoplanets visited by a spacecraft, and one of the first to be successfully landed on. |
| Atmosphere | Neon | 45% |
| Hydrogen chloride | 30% |
| Helium | 23% |
| Ethane | 1.2% |
| Methane | 0.51% |
| Hydrogen peroxide | 0% |
| Atmospheric pressure | 70 bar |
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| No known satellites |
| Google search for Steph |
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Website by Joachim Michaelis
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