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Space Astro
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Info for exoplanet "Hiyohe"
| Scientific (actual) data |
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| Planet | Kepler-399 d |
| Planet status | Confirmed |
| Radius | 0.169 |
| Orbital period | 58.0346 |
| Semi major axis | 0.261 |
| Discovered | 2014 |
| Updated | 2021-02-05 |
| Tconj | 2454970 |
| Impact parameter | 0.19 |
| Publication | Announced on a website |
| Detection type | Primary Transit |
| Alternate names | 2MASS J19580041+4040148 d, K02707.01, KIC 5480640 d, KOI-2707 d, KOI-2707.01, WISE J195800.41+404014.5 d |
| Star name | Kepler-399 |
| Right ascension | 299.5° |
| Declination | 40.67° |
| Mag j | 13.175 |
| Mag h | 12.779 |
| Mag k | 12.698 |
| Star distance | 1362.18 |
| Star metallicity | -0.827 |
| Star radius | 0.68 |
| Star temperature | 5502 |
| Star alternate names | 2MASS J19580041+4040148, KIC 5480640, KOI-2707, WISE J195800.41+404014.5 |
| Wikipedia article | Kepler-399 d |
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| Fictional info (?) |
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| Suggested name | Hiyohe |
| Planet type | Cold planet |
| It has the longest rotation period (445 days) of any planet in its solar system and rotates in the opposite direction to most other planets.
For this reason, scientists often classify Hiyohe and Hinyuja Myu as "cold planets" to distinguish them from the other planets. This cold planet is named after the deity Hiyohe, the bringer of dreams.
At this time it may appear as a bright star-like object, but is often far more difficult to observe than Hinyuja Myu.
Hiyohe is by far the hottest planet in its solar system, with a mean surface temperature of 413°K (140°C).
Hiyohe was one of the first planets to have its motions plotted across the sky - as early as the second millennium BC.
It was the one of the first exoplanets visited by a spacecraft, and one of the first to be successfully landed on. |
| Atmosphere | Nitric oxide | 59% |
| 2H2O | 22% |
| Xenon | 10% |
| Helium | 4.7% |
| Carbonyl sulfide | 4.3% |
| Atmospheric pressure | 80 bar |
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| No known satellites |
| Google search for Hiyohe |
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Website by Joachim Michaelis
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