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Space Astro
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Info for exoplanet "Himera"
| Scientific (actual) data |
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| Planet | HD 20781 d |
| Planet status | Confirmed |
| Mass sini | 0.0334 |
| Orbital period | 29.158 |
| Semi major axis | 0.1647 |
| Orbit eccentricity | 0.11 |
| Discovered | 2019 |
| Updated | 2021-08-17 |
| Omega | 60.99 |
| Tperi | 2455510 |
| K | 2.82 |
| Publication | Published in a refereed paper |
| Detection type | Radial Velocity |
| Alternate names | 2MASS J03200291-2847016 d, CD-29 1229 d, CPD-29 381 d, HD 20782 B d, HIP 15526 d, SAO 168468 d, TYC 6445-00983-1 d, WISE J032003.21-284702.4 d |
| Star name | HD 20781 |
| Right ascension | 50.01° |
| Declination | -28.78° |
| Mag v | 8.44 |
| Star distance | 35.4 |
| Star sp type | G9.5V |
| Wikipedia article | HD 20781 d |
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| Fictional info (?) |
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| Suggested name | Himera |
| Planet type | Cold planet |
| Himera and Tymuqi Fitex are cold planets rich in rock. It is named after the deity Himera, the demon of hate.
The planet telescopically displays the complete range of phases, similar to Venus and the Moon, as it moves in its inner orbit relative to HD 20781, which reoccurs over the so-called synodic period approximately every 157 days.
It has the densest atmosphere of all the cold planets, consisting partly of ethane. |
| Atmosphere | Ethane | 68% |
| Molecular hydrogen | 23% |
| Hydrogen | 4.9% |
| Ozone | 3.7% |
| Carbonyl sulfide | 0.035% |
| Atmospheric pressure | 0.9 bar |
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| Moon | Deryj Ide | Large round rocky comet |
| Fotoken | Huge round gaseous moon |
| Wore-nibe-ry | Large irregular oceanic moon |
| Numu | Medium-sized slightly egg-shaped rocky asteroid |
| Bacovoc | Very small potato shaped gaseous asteroid |
| Fute Qopeb | Small slightly egg-shaped rocky moon |
| Fudivur Ipoc | Huge potato shaped ice moon |
| Atesiv | Medium-sized almost round rocky comet |
| Atyn'imuwu | Medium-sized potato shaped oceanic moon |
| Ranikyv Icy | Very small round crater-filled moon |
| Afopy Dy | Small irregular crater-filled planetoid |
| Topav Ocena Nuf | Large almost round ice planetoid |
| Afori | Large round oceanic moon |
| Qojen | Medium-sized irregular rocky asteroid |
| Oteni | Medium-sized round gaseous comet |
| Boryrid | Small potato shaped ice asteroid |
| Bedin-anice | Huge round gaseous planetoid |
| Google search for Himera |
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Website by Joachim Michaelis
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