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Exoplanet Kepler 138 b
Exoplanet Kepler 138 b orbits star Kepler 138 that lies 219 light years away from the Sun.
It weighs about 0.07 Earth masses and orbits its star much closer than Earth orbits Sun.
Sun distance
219 light years
219 light years
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Kepler 138 b
Exoplanet
Star: Kepler 138
Distance from the star: 0.0753 AU
Orbit around star: 10.3134 days
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Orbital period
Orbital period of exoplanet Kepler 138 b around its star is 10.3134 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
Eccentricity: 0.020Basic characteristic
Mass: 0.07 M Earth
Exoplanet mass
Exoplanet Kepler 138 b has 0.07 Earth masses, or 1.27 times the mass of Mercury.
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: 0.64 R Earth | 0.1 R Jupiter
Density: 1472 kg/m3 | 26.70 % Earth
Temperature: 452 K | 178.85 °C
Year of discovery: 2014 (transit)
Other designations of this exoplanet
KOI-314 b, 2MASS J19213157+4317347 b, KIC 7603200 b, WISE J192131.55+431734.9 b
KOI-314 b, 2MASS J19213157+4317347 b, KIC 7603200 b, WISE J192131.55+431734.9 b
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Kepler 138 system structure
Exoplanet Kepler 138 b orbits star Kepler 138, which has lower mass than Sun. It is one of 4 known exoplanets orbiting this star.
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Kepler 138 | ||||||||
| Kepler 138 b | 0.08 AU | 0.1 M⊕ | 0.6 R⊕ | 10.3 days | |||||
| Kepler 138 c | 0.09 AU | 2.3 M⊕ | 1.5 R⊕ | 13.8 days | |||||
| Kepler 138 d | 0.13 AU | 2.1 M⊕ | 1.5 R⊕ | 23.1 days | |||||
| Kepler 138 e | 0.18 AU | 0.4 M⊕ | 38.2 days | ||||||
Comparison
When comparing to the Solar system planets, Kepler 138 b has 1.27 times the mass of Mercury and it orbits its star closer than Mercury orbits the Sun.
| Mercury | Venus | Earth | Mars | Jupiter | Saturn | Uranus | Neptune | ||
|---|---|---|---|---|---|---|---|---|---|
|
Mass | 1.27 | 0.09 | 0.07 | 0.64 | 0 | 0 | 0 | 0 |
|
Size | 1.67 | 0.67 | 0.64 | 1.21 | 0.06 | 0.07 | 0.16 | 0.17 |
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Density | 0.27 | 0.28 | 0.27 | 0.36 | 1.18 | 2.11 | 1.17 | 0.85 |
|
Distance | 0.19 | 0.1 | 0.08 | 0.05 | 0.01 | 0.01 | 0 | 0 |
|
Temperature | 1.03 | 0.61 | 1.57 | 2.17 | 2.77 | 3.4 | 5.79 | 6.28 |
Habitability
Habitable zone of the star: 141.4 - 203.6 AU
The planet is too hot to sustain liquid water.
The planet has mass comparable to Earth.
News from this star system
24. 12 2022
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