exoplanet_descriptions/gj_229_bb.txt Yaopi (GJ 229 Bb) - Exoplanets
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Info for exoplanet "Yaopi"


Scientific (actual) data
NameGJ 229 Bb
Planet statusConfirmed
Planet mass33.4
Orbital period12.1346
Semi major axis0.0424
Orbit eccentricity0.2317
Inclination31.4
Discovered2021
Updated2025-02-28
Temperature (kelvin)770
PublicationPublished in a refereed paper
Detection typeAstrometry, Imaging
Mass measurement typeAstrometry
Alternate namesGl 229 Bb
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 Bb

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Fictional info (?)
Suggested nameYaopi
Planet typeHuge hot gas giant
The polar regions are constantly below 126°K (-147°C).

The volume of water detected has been estimated to be equivalent to the volume of water in Lake Superior.
AtmosphereXenon60%
Molecular hydrogen37%
Nitric oxide2.4%
Atmospheric pressure5 bar
artist's rendition
No known satellites
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