exoplanet_descriptions/gj_229_d.txt Hinmutsu Nya (GJ 229 d) - Exoplanets
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Info for exoplanet "Hinmutsu Nya"


Scientific (actual) data
NameGJ 229 d
Planet statusConfirmed
Mass sini0.02495
Orbital period122.005
Semi major axis0.339
Orbit eccentricity0.29
Discovered2020
Updated2025-02-28
Omega101
K2.15
PublicationPublished in a refereed paper
Detection typeRadial Velocity
Mass measurement typeSpectrum
Alternate namesGJ 229 Ac, HD 42581 d, Gl 229 Ac
Star nameGJ 229
Right ascension92.64°
Declination-21.86°
Mag v8.125
Star distance5.75624
Star mass0.544
Star radius0.548
Star sp typeM1V
Star age2.45
Star temperature3564
Star alternate namesHD 42581, NAJ 1
Wikipedia articleGJ 229 d

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Fictional info (?)
Suggested nameHinmutsu Nya
Planet typeCold planet
The two polar ice caps appear to be made largely of sand.

Its north and south poles, therefore, lie where most other planets have their equators.
AtmosphereMethane99%
Carbon monoxide0.17%
Carbonyl sulfide0.00063%
Atmospheric pressure6 bar
artist's rendition
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