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Space Astro
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Info for exoplanet "Demedeia"
Scientific (actual) data |
Planet | Kepler-991 b |
Planet status | Confirmed |
Radius | 0.227 |
Orbital period | 82.5342 |
Discovered | 2016 |
Updated | 2021-02-05 |
Tconj | 2455040 |
Publication | Announced on a website |
Detection type | Primary Transit |
Alternate names | 2MASS J19482175+4937356 b, K01876.01, KIC 11622600 b, KOI-1876 b, KOI-1876.01, WISE J194821.73+493735.4 b |
Star name | Kepler-991 |
Right ascension | 297.09° |
Declination | 49.63° |
Mag j | 13.329 |
Mag h | 12.72 |
Mag k | 12.611 |
Star distance | 370 |
Star metallicity | -0.25 |
Star mass | 0.64 |
Star radius | 0.61 |
Star age | 3.47 |
Star temperature | 4392 |
Star alternate names | 2MASS J19482175+4937356, KIC 11622600, KOI-1876, WISE J194821.73+493735.4 |
Wikipedia article | Kepler-991 b |
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Fictional info (?) |
Suggested name | Demedeia |
Planet type | Cold planet |
This planet is named after the deity Demedeia, the god of fear.
An observer on Demedeia would therefore see only one sunrise every three years.
Two spacecraft have visited Demedeia: Wayfinder 6 flew by 27 years ago; and Messenger, launched 23 years ago, orbited Demedeia over 105 times in four years before exhausting its reactor and crashing into the planet's atmosphere 4 years later.
Demedeia is by far the hottest planet in its solar system, with a mean surface temperature of 587°K (314°C).
The two polar ice caps appear to be made largely of dust.
Demedeia can easily be seen from Aithi-mip with the naked eye, as can its greenish coloring. Its apparent magnitude reaches -3, which is surpassed only by Aithi-mip, Nogreip, and Kepler-991.
Surrounding Demedeia is a vast planetary ring system and a powerful magnetosphere. |
Atmosphere | Ammonium hydrosulfide (NH4SH) | 63% |
Formaldehyde | 27% |
Carbon dioxide | 6.2% |
2H2O | 2.2% |
Neon | 0.35% |
Oxygen | 0.22% |
Molecular hydrogen | 0.058% |
Atmospheric pressure | 100 bar |
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Moon | Liaq | Medium-sized slightly egg-shaped gaseous asteroid |
Masnoe-si | Large round ice moon |
Ditage Lisvi | Very small potato shaped rocky asteroid |
Saomone | Very small round crater-filled moon |
Google search for Demedeia |
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Website by Joachim Michaelis
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