| Fictional info (?) |
|---|
| Suggested name | Sejo Donyu |
| Planet type | Cold planet |
| Sejo Donyu has been known to astronomers since the beginning of the space age. This planet is named after the deity Sejo Donyu, the goddess of chaos.
An observer on Sejo Donyu would therefore see only one day every three years.
Sejo Donyu's axis has the smallest tilt of any of its solar system's planets.
Liquid water cannot exist on the surface of Sejo Donyu due to low atmospheric pressure, which is less than 5 percent of Sopya's, except at the highest elevations for limited periods.
Like a few of the other cold planets, Sejo Donyu has a ring system, a magnetosphere, and numerous moons, Rarya Rimyo being the least studied one. |
| Atmosphere | Methane | 85% |
| Hydrogen peroxide | 9.5% |
| Formaldehyde | 4.4% |
| Krypton | 0.53% |
| Hydrogen deuteride (HD) | 0.089% |
| Hydrogen chloride | 0.0062% |
| Atmospheric pressure | 13 bar |
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| Moon | Sahya-pyo | Large almost round rocky moon |
| Rarya Rimyo | Very small slightly egg-shaped crater-filled asteroid |
| Mahyodo-nonyo | Very small almost round ice asteroid |
| Butane Chuke | Medium-sized round ice moon |
| Pijo Gyusu-rya | Huge round rocky moon |
| Hoshi-garogya Bu | Small almost round gaseous asteroid |
| Reyore | Medium-sized irregular rocky moon |
| Shuna | Very small potato shaped rocky moon |
| Ugyage-sogepo | Large round ice comet |
| Hyonua Rashuryu | Small slightly egg-shaped ice asteroid |
| Funa Ba | Medium-sized potato shaped ice planetoid |
| Pubyome Tou | Huge irregular rocky moon |
| Rumuo | Small round ice asteroid |
| Muryo | Large potato shaped rocky moon |
| Shugi Gepyu | Very small potato shaped crater-filled moon |
| Kyuso | Very small irregular crater-filled asteroid |
| Mupu-ji | Medium-sized potato shaped ice planetoid |
| Muyu'suhyo Ryo | Small round ice moon |
| Dogyahya-su | Huge slightly egg-shaped gaseous moon |
| Tsuyo'pya | Huge potato shaped ice moon |
| Shihyose Bugo | Huge potato shaped oceanic moon |
| Nhyonya'namuhe | Small round rocky moon |
| Shibabyo | Large round gaseous asteroid |
| Kegyu'kenuda | Small slightly egg-shaped rocky planetoid |
| Bape Gaimu Be | Huge round rocky moon |
| Myashu Gyonya | Huge almost round gaseous moon |
| Hyuno-atodo-ryu | Medium-sized slightly egg-shaped gaseous comet |
| Biayu Raha Nyo | Large potato shaped crater-filled planetoid |
| Kitsu-refu-e | Medium-sized almost round crater-filled comet |
| Danagya | Huge irregular rocky asteroid |
| Zuwa Byabo | Very small potato shaped ice moon |
| Google search for Sejo donyu |