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Info for exoplanet "Sewonya'hido"


Scientific (actual) data
PlanetHD 74698 c
Planet statusConfirmed
Mass sini0.4
Orbital period3449
Semi major axis4.5
Orbit eccentricity0.2
Discovered2023
Updated2023-06-15
Omega103
Tperi2457460
K5.3
PublicationPublished in a refereed paper
Detection typeRadial Velocity
Mass detection typeRadial Velocity
Star nameHD 74698
Right ascension130.08°
Declination-71.88°
Star distance51.854
Star metallicity0.07
Star mass1.039
Star radius1.333
Star sp typeG5V
Star age1.85
Star temperature5783
Wikipedia articleHD 74698 c

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Fictional info (?)
Suggested nameSewonya'hido
Planet typeCold planet
It is a cold planet planet with a mass one-thousandth that of HD 74698, but two-and-a-half times that of all the other planets in its solar system combined. This cold planet is named after the deity Sewonya'hido, the bringer of dreams.

At this time it may appear as a bright star-like object, but is often far more difficult to observe than Bapyu'gyoyu. The planet telescopically displays the complete range of phases, similar to Venus and the Moon, as it moves in its inner orbit relative to HD 74698, which reoccurs over the so-called synodic period approximately every 116 days.

Sewonya'hido is gravitationally locked with HD 74698 in a 4:3 spin-orbit resonance, and rotates in a way that is unique in its solar system.

Sewonya'hido's axis has the smallest tilt of any of its solar system's planets.

The Sewonya'hido system has a unique configuration among those of the planets because its axis of rotation is tilted sideways, nearly into the plane of its solar orbit.
AtmosphereOxygen53%
Hydrogen peroxide26%
Hydrogen deuteride (HD)20%
Molecular hydrogen0.76%
Sulfur dioxide0.33%
Water vapor0.038%
Krypton1.0E-6%
Atmospheric pressure60 bar
artist's rendition
No known satellites
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