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Exoplanet K2-266 A b
Exoplanet K2-266 A b orbits star K2-266 A that lies 253 light years away from the Sun.
It weighs about 11.3 Earth masses and orbits its star much closer than Earth orbits Sun.
Sun distance
253 light years
253 light years
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K2-266 A b
Exoplanet, sub-neptune, ultra-short period
Star: K2-266 A
Distance from the star: 0.01306 AU
Orbit around star: 0.658524 days
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Orbital period
Orbital period of exoplanet K2-266 A b around its star is 0.658524 days.
The orbital period of an exoplanet is the time it takes to complete one full orbit around its star, usually measured in days. Most of the exoplanets discovered so far have orbital periods of less than one year...
More about Orbital period in StellarGuide
Basic characteristic
Mass: 11.3 M Earth
Exoplanet mass
Exoplanet K2-266 A b has 11.3 Earth masses, or 0.77 times the mass of Uranus.
The mass of an exoplanet is one of the most important characteristics for understanding what kind of world it is — whether it’s small and rocky like Earth or large and gaseous like Jupiter. Mass provides key information about the planet’s composition, gravity, and formation history...
More about Exoplanet mass in StellarGuide
Size: 3.3 R Earth | 0.3 R Jupiter
Density: 1734 kg/m3 | 31.45 % Earth
Temperature: 1515 K | 1241.85 °C
Year of discovery: 2018 (transit)
Other designations of this exoplanet
2MASS J10314450+0056152 b, TIC 374180079 b, EPIC 248435473 b
2MASS J10314450+0056152 b, TIC 374180079 b, EPIC 248435473 b
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K2-266 system structure
Exoplanet K2-266 A b orbits star K2-266 A, which has lower mass than Sun. It is one of 4 known exoplanets orbiting this star.
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K2-266 A | ||||||||
| K2-266 A b | 0.01 AU | 11.3 M⊕ | 3.3 R⊕ | 0.7 days | |||||
| K2-266 A c | 0.07 AU | 0.3 M⊕ | 0.7 R⊕ | 7.8 days | |||||
| K2-266 A d | 0.1 AU | 9.4 M⊕ | 2.9 R⊕ | 14.7 days | |||||
| K2-266 A e | 0.12 AU | 8.3 M⊕ | 2.7 R⊕ | 19.5 days | |||||
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K2-266 B | 3316 AU | |||||||
Comparison
When comparing to the Solar system planets, K2-266 A b has 77 % of mass of Uranus and it orbits its star closer than Mercury orbits the Sun.
| Mercury | Venus | Earth | Mars | Jupiter | Saturn | Uranus | Neptune | ||
|---|---|---|---|---|---|---|---|---|---|
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Mass | 205.45 | 13.87 | 11.3 | 102.73 | 0.04 | 0.12 | 0.77 | 0.66 |
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Size | 8.62 | 3.47 | 3.3 | 6.23 | 0.29 | 0.36 | 0.83 | 0.87 |
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Density | 0.32 | 0.33 | 0.31 | 0.43 | 1.39 | 2.49 | 1.38 | 1 |
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Distance | 0.03 | 0.02 | 0.01 | 0.01 | 0 | 0 | 0 | 0 |
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Temperature | 3.44 | 2.06 | 5.26 | 7.28 | 9.29 | 11.39 | 19.42 | 21.04 |
Habitability
Habitable zone of the star: 94.2 - 135.7 AU
The planet orbits too close to its star and is exposed to extreme temperatures and radiation prohibiting life as we know it.
The planet is bigger than Earth and smaller than Neptune. Its average density 1734 kg/m3 points to a hot gas planet.