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Info for exoplanet "Mihoe Mathe"


Scientific (actual) data
PlanetHD 158259 d
Planet statusConfirmed
Mass sini0.01702
Orbital period5.19808
Discovered2019
Updated2021-09-07
K1.90714
PublicationPublished in a refereed paper
Detection typeRadial Velocity
Mass detection typeSpectrum
Star nameHD 158259
Right ascension261.35°
Declination52.79°
Mag v6.46
Star distance27.08
Star mass1.08
Star radius1.21
Star sp typeG0
Wikipedia articleHD 158259 d

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Fictional info (?)
Suggested nameMihoe Mathe
Planet typeCold planet
This planet is named after the deity Mihoe Mathe, the demon of dreams.

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 158259, which reoccurs over the so-called synodic period approximately every 139 days.

Its orbital eccentricity is the largest of all known planets in its solar system; at perihelion, Mihoe Mathe's distance from HD 158259 is only about two-thirds (or 40 pct) of its distance at aphelion.

The smooth Borealis basin in the northern hemisphere covers 30 percent of the planet and may be a giant impact feature.
AtmosphereCarbon monoxide66%
2H2O31%
Ammonium hydrosulfide (NH4SH)2%
Ammonia0.00059%
Molecular hydrogen1.0E-6%
Atmospheric pressure0.0021 bar
artist's rendition
No known satellites
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