stars
exoplanets
news
Exoplanet HD 212657 b
Exoplanet HD 212657 b orbits star HD 212657 that lies 263 light years away from the Sun.
It weighs about 7 Earth masses and orbits its star much closer than Earth orbits Sun.
Sun distance
263 light years
263 light years
Loading may take a moment.
HD 212657 b
Exoplanet, sub-neptune
Star: HD 212657
Distance from the star: 0.0939 AU
Orbit around star: 9.978543 days
+
Orbital period
Orbital period of exoplanet HD 212657 b around its star is 9.978543 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: 0.3Basic characteristic
Mass: 7 M Earth
Exoplanet mass
Exoplanet HD 212657 b has 7 Earth masses, or 0.48 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: 2.33 R Earth | 0.2 R Jupiter
Density: 3051 kg/m3 | 55.34 % Earth
Temperature: 1203 K | 929.85 °C
Year of discovery: 2015 (transit)
Other designations of this exoplanet
K2-167 b
K2-167 b
Advertisement
HD 212657 system structure
Exoplanet HD 212657 b orbits star HD 212657, which has bigger mass than Sun. It is the only known exoplanet orbiting this star
|
|
HD 212657 | ||||||||
| HD 212657 b | 0.09 AU | 7 M⊕ | 2.3 R⊕ | 10 days | |||||
Comparison
When comparing to the Solar system planets, HD 212657 b has 48 % of mass of Uranus and it orbits its star closer than Mercury orbits the Sun.
| Mercury | Venus | Earth | Mars | Jupiter | Saturn | Uranus | Neptune | ||
|---|---|---|---|---|---|---|---|---|---|
|
Mass | 127.27 | 8.59 | 7 | 63.64 | 0.02 | 0.07 | 0.48 | 0.41 |
|
Size | 6.09 | 2.45 | 2.33 | 4.4 | 0.21 | 0.26 | 0.58 | 0.61 |
|
Density | 0.56 | 0.58 | 0.55 | 0.75 | 2.45 | 4.38 | 2.43 | 1.77 |
|
Distance | 0.24 | 0.13 | 0.09 | 0.06 | 0.02 | 0.01 | 0 | 0 |
|
Temperature | 2.73 | 1.63 | 4.18 | 5.78 | 7.38 | 9.05 | 15.42 | 16.71 |
Habitability
Habitable zone of the star: 1.5 - 2.2 AU
The planet is too hot to sustain liquid water.