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Space Astro
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Info for exoplanet "Thopaa"
| Scientific (actual) data |
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| Planet | HIP 109384 b |
| Planet status | Confirmed |
| Mass sini | 1.56 |
| Orbital period | 499.48 |
| Semi major axis | 1.134 |
| Orbit eccentricity | 0.549 |
| Discovered | 2016 |
| Updated | 2016-02-17 |
| Omega | 104.49 |
| Tperi | 2456340 |
| K | 56.53 |
| Publication | Published in a refereed paper |
| Detection type | Radial Velocity |
| Mass detection type | Radial Velocity |
| Star name | HIP 109384 |
| Right ascension | 332.13° |
| Declination | 71.31° |
| Mag v | 9.63 |
| Star distance | 56.2 |
| Star metallicity | -0.26 |
| Star mass | 0.78 |
| Star sp type | G5 |
| Star temperature | 5180 |
| Wikipedia article | HIP 109384 b |
Back
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| Fictional info (?) |
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| Suggested name | Thopaa |
| Planet type | Cold planet |
| It is the second-brightest natural object in the night sky after Boslaris Hi, reaching an apparent magnitude of -5 - bright enough to cast shadows at night and, rarely, visible to the naked eye in broad daylight.
Thopaa is similar in composition to Boslaris Hi, and both have different bulk chemical composition from that of the larger cold planets. The interior of Thopaa is mainly composed of ices and molten metal. This planet is named after the deity Thopaa, the bringer of prosperity.
Thopaa is gravitationally locked with HIP 109384 in a 4:3 spin-orbit resonance, and rotates in a way that is unique in its solar system. An observer on Thopaa would therefore see only one day every two years.
Having almost no atmosphere to retain heat, it has surface temperatures that vary diurnally more than on any other planet in its solar system, ranging from 115°K (-158°C) at night to 455°K (182°C) during the day across the equatorial regions.
It may have had water vapor oceans in the past, but these would have vaporized as the temperature rose due to a runaway greenhouse effect.
The smooth Borealis basin in the northern hemisphere covers 17 percent of the planet and may be a giant impact feature. |
| Atmosphere | Hydrogen | 97% |
| Hydrogen peroxide | 2.7% |
| Water vapor | 0.035% |
| Neon | 1.6E-5% |
| Atmospheric pressure | 80 bar |
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| Moon | Nacarmun Kesi | Large potato shaped crater-filled moon |
| Google search for Thopaa |
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Website by Joachim Michaelis
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