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Exoplanet K2-229 d
Exoplanet K2-229 d orbits star K2-229 that lies 334 light years away from the Sun.
It weighs about 25.115 Earth masses and orbits its star closer than Earth orbits Sun.
Sun distance
334 light years
334 light years
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K2-229 d
Exoplanet, super-earth
Star: K2-229
Distance from the star: 0.182 AU
Orbit around star: 31.0 days
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Orbital period
Orbital period of exoplanet K2-229 d around its star is 31.0 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: 0.39Basic characteristic
Mass: 25.115 M Earth
Exoplanet mass
Exoplanet K2-229 d has 25.115 Earth masses, or 1.46 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: 2.65 R Earth | 0.2 R Jupiter
Density: 7441 kg/m3 | 134.97 % Earth
Temperature: 522 K | 248.85 °C
Year of discovery: 2018 (transit)
Other designations of this exoplanet
2MASS J12272958-0643188 d, EPIC 228801451 d
2MASS J12272958-0643188 d, EPIC 228801451 d
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Comparison
When comparing to the Solar system planets, K2-229 d has 1.46 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 | 456.64 | 30.82 | 25.12 | 228.32 | 0.08 | 0.26 | 1.72 | 1.46 |
|
Size | 6.92 | 2.79 | 2.65 | 5 | 0.24 | 0.29 | 0.66 | 0.7 |
|
Density | 1.38 | 1.42 | 1.35 | 1.83 | 5.98 | 10.68 | 5.92 | 4.31 |
|
Distance | 0.47 | 0.25 | 0.18 | 0.12 | 0.03 | 0.02 | 0.01 | 0.01 |
|
Temperature | 1.19 | 0.71 | 1.81 | 2.51 | 3.2 | 3.92 | 6.69 | 7.25 |