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Exoplanet Kepler-22 b
Exoplanet Kepler-22 b orbits star Kepler-22 that lies 644 light years away from the Sun.
It weighs about 9.1 Earth masses and orbits its star closer than Earth orbits Sun.
Sun distance
644 light years
644 light years
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Kepler-22 b
Exoplanet, ocean planet
Star: Kepler-22
Distance from the star: 0.812 AU
Orbit around star: 289.8623 days
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Orbital period
Orbital period of exoplanet Kepler-22 b around its star is 289.8623 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: 9.1 M Earth
Exoplanet mass
Exoplanet Kepler-22 b has 9.1 Earth masses, or 0.62 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: 2.1 R Earth | 0.2 R Jupiter
Density: 5418 kg/m3 | 98.28 % Earth
Temperature: 262 K | -11.15 °C
Year of discovery: 2011 (transit)
Other designations of this exoplanet
Gaia DR2 2127941757262806656 b, KOI-87 b, KIC 10593626 b, GSC 03546-02301 b, 2MASS J19165219+4753040 b
Gaia DR2 2127941757262806656 b, KOI-87 b, KIC 10593626 b, GSC 03546-02301 b, 2MASS J19165219+4753040 b
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Kepler-22 system structure
Exoplanet Kepler-22 b orbits star Kepler-22, which has lower mass than Sun. It is the only known exoplanet orbiting this star
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Kepler-22 | ||||||||
| Kepler-22 b | 0.81 AU | 9.1 M⊕ | 2.1 R⊕ | 289.9 days | |||||
Comparison
When comparing to the Solar system planets, Kepler-22 b has 62 % of mass of Uranus and it orbits its star between distances of Venus and Earth from the Sun.
| Mercury | Venus | Earth | Mars | Jupiter | Saturn | Uranus | Neptune | ||
|---|---|---|---|---|---|---|---|---|---|
|
Mass | 165.45 | 11.17 | 9.1 | 82.73 | 0.03 | 0.1 | 0.62 | 0.53 |
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Size | 5.48 | 2.21 | 2.1 | 3.96 | 0.19 | 0.23 | 0.53 | 0.55 |
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Density | 1 | 1.03 | 0.98 | 1.33 | 4.35 | 7.78 | 4.31 | 3.14 |
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Distance | 2.08 | 1.12 | 0.81 | 0.53 | 0.16 | 0.09 | 0.04 | 0.03 |
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Temperature | 0.6 | 0.36 | 0.91 | 1.26 | 1.61 | 1.97 | 3.36 | 3.64 |
Habitability
Habitable zone of the star: 0.87 - 1.2 AU
The planet is orbiting on the edge of the habitable zone of its star.
The planet is bigger than Earth, but smaller than Neptune. Its average density seems to be comparable to rocky planets in the Solar System.