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Space Astro
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Info for exoplanet "Steph"
| Scientific (actual) data |
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| Planet | Kepler-21 b |
| Planet status | Confirmed |
| Planet mass | 0.01598 |
| Radius | 0.146 |
| Orbital period | 2.78578 |
| Semi major axis | 0.042717 |
| Orbit eccentricity | 0.02 |
| Inclination | 83.2 |
| Angular distance | 0.000394 |
| Discovered | 2012 |
| Updated | 2021-02-05 |
| Omega | -15 |
| Tperi | 2456800 |
| Tconj | 2456800 |
| Tzero tr | 2455090 |
| Impact parameter | 0.584 |
| K | 1.99 |
| Temperature (kelvin) | 2025 |
| Publication | Announced on a professional conference |
| Detection type | Primary Transit |
| Radius detection type | Primary Transit |
| Alternate names | Kepler-21 b, 2MASS J19092683+3842505 b, BD+38 3455 b, HD 179070 b, HIP 94112 b, K00975.01, KIC 3632418 b, KOI-975 b, KOI-975.01, Kepler-21 A b, SAO 67891 b, TYC 3120-00963-1 b, WISE J190926.86+384250.7 b |
| Star name | Kepler-21 |
| Right ascension | 287.36° |
| Declination | 38.71° |
| Mag v | 8.27 |
| Mag j | 7.229 |
| Mag h | 7.031 |
| Star distance | 108.86 |
| Star metallicity | -0.03 |
| Star mass | 1.41 |
| Star radius | 1.9 |
| Star sp type | F6 IV |
| Star age | 3.03 |
| Star temperature | 6305 |
| Star alternate names | Kepler-21, 2MASS J19092683+3842505, BD+38 3455, HD 179070, HIP 94112, KIC 3632418, KOI-975, Kepler-21 A, SAO 67891, TYC 3120-00963-1, WISE J190926.86+384250.7 |
| Wikipedia article | Kepler-21 b |
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| Fictional info (?) |
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| Suggested name | Steph |
| Planet type | Hot planet |
| When viewed from Sibos, Steph can reach an apparent magnitude of -3, bright enough for its reflected light to cast shadows, and making it on average the third-brightest object in the night sky. This hot planet is named after the deity Steph, the messenger of hate.
At this time it may appear as a bright star-like object, but is often far more difficult to observe than Sibos.
It has the densest atmosphere of the known hot planets, consisting primarily of hydrogen deuteride (HD). |
| Atmosphere | Hydrogen deuteride (HD) | 58% |
| Water vapor | 27% |
| Carbon monoxide | 14% |
| Formaldehyde | 0.12% |
| Atmospheric pressure | 7 bar |
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| No known satellites |
| Google search for Steph |
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Website by Joachim Michaelis
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