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Youn (K2-138 e), Exoplanets, Astro
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Info for exoplanet "Youn"


Scientific (actual) data
NameK2-138 e
Planet statusConfirmed
Planet mass0.0409
Radius0.294
Orbital period8.26144
Semi major axis0.07807
Orbit eccentricity0.315
Inclination88.7
Discovered2017
Updated2021-03-26
Omega180
Tconj2457740
Tzero tr2457740
Impact parameter0.44
K4.31
Temp calculated861
PublicationPublished in a refereed paper
Detection typePrimary Transit
Mass measurement typeSpectrum
Radius measurement typePrimary Transit
Alternate names2MASS J23154776-1050590 e, EPIC 245950175 e, WISE J231547.76-105059.0 e
Star nameK2-138
Ra348.95°
Dec-10.85°
Mag v12.21
Mag j10.756
Mag h10.384
Star distance183
Star metallicity0.16
Star mass0.93
Star radius0.86
Star sp typeK1 V
Star temperature5378
Star alternate namesEPIC 245950175, 2MASS J23154776-1050590, WISE J231547.76-105059.0
Wikipedia articleK2-138 e

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Fictional info (?)
Youn
Small warm gas planet
AtmosphereHydrogen deuteride (HD)49%
Carbonyl sulfide23%
Carbon monoxide13%
Hydrogen12%
Methane2.2%
Water vapor0.00074%
10 bar
1.3 × Earth
artist's rendition
MoonWaqo KouHuge round gaseous planetoid
Shai Dand YanLarge slightly egg-shaped oceanic moon
Yinghyun-pHuge round rocky moon
Agyou Sesh WaiHuge slightly egg-shaped ice comet
Yehwobyao ByaoLarge slightly egg-shaped ice asteroid
Zheig'engkyinVery small round rocky planetoid
YaodyouMedium-sized almost round oceanic asteroid
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