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Space Astro
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Info for exoplanet "Rionhe"
| Scientific (actual) data |
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| Planet | K2-149 b |
| Planet status | Confirmed |
| Radius | 0.146 |
| Orbital period | 11.332 |
| Semi major axis | 0.083 |
| Discovered | 2018 |
| Updated | 2021-02-05 |
| Tconj | 2457390 |
| Tzero tr | 2457390 |
| Publication | Published in a refereed paper |
| Detection type | Primary Transit |
| Alternate names | 2MASS J00391724+0716375 b, EPIC 220522664 b, WISE J003917.22+071637.3 b |
| Star name | K2-149 |
| Right ascension | 9.82° |
| Declination | 7.28° |
| Mag j | 11.452 |
| Mag h | 10.762 |
| Star distance | 118 |
| Star metallicity | 0.11 |
| Star mass | 0.59 |
| Star radius | 0.57 |
| Star sp type | M1.0 V |
| Star temperature | 3745 |
| Star alternate names | 2MASS J00391724+0716375, EPIC 220522664, WISE J003917.22+071637.3 |
| Wikipedia article | K2-149 b |
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| Fictional info (?) |
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| Suggested name | Rionhe |
| Planet type | Terrestrial |
| This planet is named after the deity Rionhe, the messenger of the sea.
At this time it may appear as a bright star-like object, but is often far more difficult to observe than Sutfar.
An observer on Rionhe would therefore see only one day every three years.
Rionhe is a terrestrial and is sometimes called Sutfar's "twin planet" because of their similar size, mass, proximity to K2-149, and bulk composition. It is radically different from Sutfar in other respects. Rionhe is shrouded by an opaque layer of highly reflective clouds of sulfuric acid, preventing its surface from being seen from space in visible light.
Rionhe was one of the first planets to have its motions plotted across the sky - as early as the second millennium BC.
As the closest planet to Sutfar, Rionhe has been a prime target for early interplanetary exploration.
The smooth Borealis basin in the northern hemisphere covers 27 percent of the planet and may be a giant impact feature.
The two polar ice caps appear to be made largely of water.
Because of its fast rotation, the planet's shape is that of an oblate spheroid (it has a slight but noticeable bulge around the equator). |
| Atmosphere | Carbon dioxide | 79% |
| Water vapor | 19% |
| Nitric oxide | 1.8% |
| Argon | 0.00021% |
| Atmospheric pressure | 13 bar |
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| No known satellites |
| Google search for Rionhe |
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Website by Joachim Michaelis
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