exoplanet_descriptions/jw_121_b.txt Byoya'ji (JW 121 b) - Exoplanets
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Info for exoplanet "Byoya'ji"


Scientific (actual) data
NameJW 121 b
Planet statusConfirmed
Planet mass60.9
Semi major axis153.6
Angular distance0.39
Discovered2020
Updated2025-08-30
PublicationPublished in a refereed paper
Detection typeImaging
Mass measurement typeSpectrum
Alternate namesV2061 Ori
Star nameJW 121
Right ascension83.71°
Declination-5.28°
Mag v18.6
Mag i14.45
Mag j12.3
Mag h11.2
Mag k10.57
Star distance387.33
Star metallicity-0.04
Star mass0.8
Star radius1.93
Star sp typeM3
Star age0.0008
Star temperature3715
Star alternate namesV2061 Ori
Wikipedia articleJW 121 b

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Fictional info (?)
Suggested nameByoya'ji
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 170°K (-103°C) at night to 980°K (707°C) during the day across the equatorial regions. The polar regions are constantly below 126°K (-147°C).

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AtmosphereHydrogen93%
Nitric oxide4.9%
Oxygen0.72%
Hydrogen peroxide0.59%
Neon3.2E-5%
Atmospheric pressure4 bar
artist's rendition
MoonHinoha'suheMedium-sized slightly egg-shaped ice planetoid
Tekyu'zeze-bebyaVery small almost round crater-filled comet
Ewochi-byuMedium-sized slightly egg-shaped crater-filled moon
Gyunoko-hyobyo JuSmall round rocky comet
Pazanoyo-rufuVery small potato shaped oceanic moon
Byasha YufuSmall round rocky asteroid
Nyojo KunLarge potato shaped ice planetoid
Sesokyu'nyagoeVery small round crater-filled asteroid
Gyaro-gyose RaMedium-sized potato shaped oceanic asteroid
HokiMedium-sized irregular oceanic planetoid
Koawo-taVery small irregular rocky asteroid
Shuhyomi-yapaLarge round oceanic asteroid
Tokyo GasaHuge potato shaped ice asteroid
KyuhoteLarge potato shaped gaseous asteroid
Sapo'kyogyoLarge potato shaped rocky moon
Teshi Onyugyo-koLarge round oceanic comet
HaranaSmall irregular crater-filled asteroid
Kumitsu'jiVery small irregular ice asteroid
Bohoda ZuLarge potato shaped gaseous moon
UpyagaMedium-sized irregular crater-filled moon
Pumya-nuHuge almost round rocky asteroid
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