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Exoplanet K2-38 b
Exoplanet K2-38 b orbits star K2-38 that lies 622 light years away from the Sun.
It weighs about 19.074 Earth masses and orbits its star much closer than Earth orbits Sun.
Sun distance
622 light years
622 light years
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K2-38 b
Exoplanet, super-earth
Star: K2-38
Distance from the star: 0.04994 AU
Orbit around star: 4.01593 days
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Orbital period
Orbital period of exoplanet K2-38 b around its star is 4.01593 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: 0.197Basic characteristic
Mass: 19.074 M Earth
Exoplanet mass
Exoplanet K2-38 b has 19.074 Earth masses, or 1.11 times the mass of Neptune.
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: 1.906 R Earth | 0.2 R Jupiter
Density: 15188 kg/m3 | 275.49 % Earth
Temperature: 1266 K | 992.85 °C
Year of discovery: 2016 (transit)
Other designations of this exoplanet
2MASS J16000805-2311213 b, EPIC 204221263 b, TYC 6779-268-1 b, WISE J160008.01-231121.6 b
2MASS J16000805-2311213 b, EPIC 204221263 b, TYC 6779-268-1 b, WISE J160008.01-231121.6 b
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Comparison
When comparing to the Solar system planets, K2-38 b has 1.11 times the mass of Neptune and it orbits its star closer than Mercury orbits the Sun.
| Mercury | Venus | Earth | Mars | Jupiter | Saturn | Uranus | Neptune | ||
|---|---|---|---|---|---|---|---|---|---|
|
Mass | 346.8 | 23.4 | 19.07 | 173.4 | 0.06 | 0.2 | 1.31 | 1.11 |
|
Size | 4.98 | 2.01 | 1.91 | 3.6 | 0.17 | 0.21 | 0.48 | 0.5 |
|
Density | 2.81 | 2.9 | 2.75 | 3.73 | 12.21 | 21.81 | 12.08 | 8.79 |
|
Distance | 0.13 | 0.07 | 0.05 | 0.03 | 0.01 | 0.01 | 0 | 0 |
|
Temperature | 2.88 | 1.72 | 4.4 | 6.09 | 7.77 | 9.52 | 16.23 | 17.58 |
Habitability
Habitable zone of the star: 1 - 1.5 AU
The planet is too hot to sustain liquid water.