exoplanet_descriptions/hd_164604_c.txt Mewonere (HD 164604 c), Exoplanets
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Info for exoplanet "Mewonere"


Scientific (actual) data
NameHD 164604 c
Planet statusConfirmed
Planet mass9.5
Orbital period5387
Semi major axis5.556
Orbit eccentricity0.2
Inclination8.6
Discovered2026
Updated2026-02-12
Omega89
Tperi2452950
K19.9
PublicationPublished in a refereed paper
Detection typeRadial Velocity
Mass measurement typeRadial Velocity
Star nameHD 164604
Right ascension270.78°
Declination-28.56°
Mag v9.7
Star distance39.4
Star metallicity-0.18
Star mass0.77
Star sp typeK3.5V
Star temperature4684
Wikipedia articleHD 164604 c

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Fictional info (?)
Suggested nameMewonere
Planet typeHuge cold gas giant
Having almost no atmosphere to retain heat, it has surface temperatures that vary diurnally more than on any other planet in its solar system, ranging from 140°K (-133°C) at night to 490°K (217°C) during the day across the equatorial regions.

The smooth Borealis basin in the northern hemisphere covers 33 percent of the planet and may be a giant impact feature.
AtmosphereHydrogen97%
Carbon monoxide2.1%
Carbonyl sulfide0.075%
2H2O0.074%
Ammonium hydrosulfide (NH4SH)0.0029%
Atmospheric pressure21 bar
artist's rendition
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