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Info for exoplanet "Hyobo No"


Scientific (actual) data
PlanetTOI-1268 b
Planet statusConfirmed
Planet mass0.29
Radius0.82
Orbital period8.15771
Semi major axis0.072
Orbit eccentricity0.09
Inclination88.98
Discovered2022
Updated2023-07-20
Omega338
Tzero tr2458710
Lambda angle27
Impact parameter0.423
K31.7
Temperature (kelvin)919
PublicationPublished in a refereed paper
Detection typePrimary Transit
Mass detection typeRadial Velocity
Radius detection typePrimary Transit
Star nameTOI-1268
Right ascension198.39°
Declination62.31°
Mag v11
Star distance110
Star metallicity0.25
Star mass0.96
Star radius0.92
Star sp typeK1-K2
Star age0.29
Star temperature5200
Wikipedia articleTOI-1268 b

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Fictional info (?)
Suggested nameHyobo No
Planet typeWarm gas giant
It is the second-brightest natural object in the night sky after Koepu, reaching an apparent magnitude of -5 - bright enough to cast shadows at night and, sometimes, visible to the naked eye in broad daylight. Orbiting within Koepu's orbit, Hyobo No is an inferior planet and never appears to venture far from TOI-1268; its maximum angular distance from TOI-1268 (elongation) is 36 degrees.

This warm gas giant is named after the deity Hyobo No, the demon of the underworld.

Hyobo No is gravitationally locked with TOI-1268 in a 5:4 spin-orbit resonance, and rotates in a way that is unique in its solar system.

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 120°K (-153°C) at night to 525°K (252°C) during the day across the equatorial regions.

Hyobo No is shrouded by an opaque layer of highly reflective clouds of sulfuric acid, preventing its surface from being seen from space in visible light. The carbonyl sulfide has probably photodissociated, and the free ozone has been swept into interplanetary space by the solar wind because of the lack of a planetary magnetic field.

Hyobo No's thick atmosphere make observation of its surface impossible in ultraviolet light, and the first detailed maps did not emerge until the arrival of the Magellan orbiter 30 years ago.

Hyobo No has been explored on several occasions by robotic spacecraft, most notably during the early Pioneer and Wayfinder flyby missions and later by the Isaac orbiter.

In 2780, images from Daedalus 6 showed Hyobo No as an almost featureless planet in visible light, without the cloud bands or storms associated with the other warm gas giants.
AtmosphereOzone70%
Formaldehyde21%
Carbonyl sulfide7.5%
Ethane0.76%
Atmospheric pressure17 bar
artist's rendition
No known satellites
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