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Info for exoplanet "Medeia Theus"


Scientific (actual) data
PlanetTOI-172 b
Planet statusConfirmed
Planet mass5.41
Radius0.965
Orbital period9.47721
Semi major axis0.0913
Orbit eccentricity0.3805
Inclination88.3
Discovered2019
Updated2021-01-15
Omega57.1
Tperi2458330
Tzero tr2458330
Impact parameter0.22
K517.6
Temperature (kelvin)1198
PublicationPublished in a refereed paper
Detection typePrimary Transit
Mass detection typeRadial Velocity
Radius detection typePrimary Transit
Star nameTOI-172
Right ascension316.63°
Declination-26.69°
Mag v11.4
Star distance336.47
Star metallicity0.146
Star mass1.124
Star radius1.774
Star age7.5
Star temperature5644
Wikipedia articleTOI-172 b

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Fictional info (?)
Suggested nameMedeia Theus
Planet typeLarge warm gas giant
Medeia Theus is a terrestrial planet with a thin atmosphere, having surface features reminiscent both of the impact craters of the Moon and the valleys, deserts, and polar ice caps of Earth. Medeia Theus is orbiting TOI-172 every 9.5 Earth days.

This planet is named after the deity Medeia Theus, the demon of fear.

Medeia Theus is by far the hottest planet in its solar system, with a mean surface temperature of 479°K (206°C), even though Dyslene Erton is closer to TOI-172. It may have had 2H2O oceans in the past, but these would have vaporized as the temperature rose due to a runaway greenhouse effect.

Observations from Earth have shown seasonal change and increased weather activity as Medeia Theus approached its equinox 5 years ago.
AtmosphereMethane59%
Helium24%
2H2O9.6%
Carbon monoxide5.5%
Hydrogen deuteride (HD)0.51%
Nitrogen0.45%
Sulfur dioxide0.052%
Water vapor0.0076%
Atmospheric pressure0.007 bar
artist's rendition
No known satellites
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