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Info for exoplanet "Gekyutsu Ri"


Scientific (actual) data
PlanetNGTS-15 b
Planet statusConfirmed
Planet mass0.751
Radius1.1
Orbital period3.27623
Semi major axis0.0441
Orbit eccentricity0
Discovered2021
Updated2021-03-19
Tzero tr2458400
Impact parameter0.509
K106
Temperature (kelvin)1146
PublicationPublished in a refereed paper
Detection typePrimary Transit
Mass detection typeRadial Velocity
Radius detection typePrimary Transit
Star nameNGTS-15
Right ascension73.35°
Declination-32.8°
Mag v14.6
Star distance791
Star metallicity0.15
Star mass0.995
Star radius0.954
Star sp typeG6V
Star age3.28
Star temperature5600
Wikipedia articleNGTS-15 b

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Fictional info (?)
Suggested nameGekyutsu Ri
Planet typeHot gas giant
It is the coldest planetary atmosphere in its solar system, with a minimum temperature of 40°K (-233°C), and has a complex, layered cloud structure with ammonium hydrosulfide (NH4SH) thought to make up the lowest clouds, and 2H2O the uppermost layer of clouds. This planet is named after the deity Gekyutsu Ri, the creator of the underworld.

Like Bunutsu-ka, Gekyutsu Ri has been orbiting NGTS-15 for 3.3 billion years, and never exceeds 30 degrees away from NGTS-15. At this time it may appear as a bright star-like object, but is often far more difficult to observe than Bunutsu-ka.

The ethane has probably photodissociated, and the free 2H2O has been swept into interplanetary space by the solar wind because of the lack of a ammonia layer.

Gekyutsu Ri is the site of Ars Montanus, the largest volcano and second-highest known mountain in its solar system, and of Valles Marineris, one of the largest canyons in its solar system.

Observations from Earth have shown seasonal change and increased weather activity as Gekyutsu Ri approached its equinox 6 years ago.
Atmosphere2H2O48%
Ammonium hydrosulfide (NH4SH)37%
Ethane9.2%
Ammonia4.1%
Neon0.8%
Water vapor0.24%
Atmospheric pressure0.019 bar
artist's rendition
MoonSuchu'jimu-yuLarge round rocky moon
Rareda-choLarge round ice asteroid
Rikya Ryashu MoHuge potato shaped crater-filled comet
Byoto KichuSmall round gaseous moon
TagiVery small slightly egg-shaped ice moon
Chipo'mapioLarge irregular rocky moon
Chunya Momyo'nyuLarge irregular gaseous asteroid
Kyugopyu HiVery small slightly egg-shaped ice moon
Myopu'jami PureMedium-sized potato shaped ice moon
Ryubejo MoSmall almost round rocky moon
Nokyafu NyoVery small almost round rocky planetoid
KaheMedium-sized potato shaped gaseous asteroid
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