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Space Astro
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Info for exoplanet "Yubyu"
| Scientific (actual) data |
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| Planet | GJ 3998 c |
| Planet status | Confirmed |
| Mass sini | 0.0197 |
| Orbital period | 13.74 |
| Semi major axis | 0.089 |
| Orbit eccentricity | 0.049 |
| Discovered | 2016 |
| Updated | 2016-07-19 |
| Tconj | 2456900 |
| K | 2.67 |
| Publication | Published in a refereed paper |
| Detection type | Radial Velocity |
| Mass detection type | Radial Velocity |
| Star name | GJ 3998 |
| Right ascension | 259° |
| Declination | 11.06° |
| Mag v | 10.8 |
| Star distance | 17.8 |
| Star metallicity | -0.16 |
| Star mass | 0.5 |
| Star radius | 0.49 |
| Star sp type | M1 |
| Star temperature | 3722 |
| Wikipedia article | GJ 3998 c |
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| Fictional info (?) |
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| Suggested name | Yubyu |
| Planet type | Terrestrial |
| For this reason, scientists often classify Yubyu and Hyamya as "terrestrials" to distinguish them from the other planets. This terrestrial is named after the deity Yubyu, the demon of good fortune.
Yubyu is gravitationally locked with GJ 3998 in a 4:3 spin-orbit resonance, and rotates in a way that is unique in its solar system.
Two spacecraft have visited Yubyu: Daedalus 6 flew by 42 years ago; and Messenger, launched 23 years ago, orbited Yubyu over 70 times in four years before exhausting its pwoer source and crashing into the planet's surface 4 years later. |
| Atmosphere | Ammonia | 57% |
| Carbon monoxide | 25% |
| Molecular hydrogen | 17% |
| Formaldehyde | 1% |
| Carbonyl sulfide | 0.076% |
| Argon | 1.7E-5% |
| Atmospheric pressure | 0.025 bar |
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| Moon | Byamai | Very small slightly egg-shaped oceanic moon |
| Gaugyo Ke | Small slightly egg-shaped ice planetoid |
| Gyoda-betoki Bi | Small irregular ice asteroid |
| Sorumya-myokyo Ru | Medium-sized potato shaped rocky planetoid |
| Nuyomobyu-ya | Large round rocky asteroid |
| Somyu-fumya | Medium-sized almost round crater-filled moon |
| Hetedo-mahi | Huge round rocky asteroid |
| Kegyu | Medium-sized almost round crater-filled comet |
| Damopa Byofu | Large almost round ice asteroid |
| Google search for Yubyu |
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Website by Joachim Michaelis
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