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Exoplanet HD 18438 b
Exoplanet HD 18438 b orbits star HD 18438 that lies 768 light years away from the Sun.
It weighs about 6676.047 Earth masses and orbits its star further than Earth orbits Sun.
Sun distance
768 light years
768 light years
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HD 18438 b
Exoplanet, brown dwarf
Star: HD 18438
Distance from the star: 2.1 AU
Orbit around star: 803 days
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Orbital period
Orbital period of exoplanet HD 18438 b around its star is 803 days (or 2.2 years).
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: 0.1Basic characteristic
Mass: 6676.047 M Earth
| 21.0071 M Jupiter
Exoplanet mass
Exoplanet HD 18438 b has 6676.047 Earth masses (or 21.0071 Jupiter masses).
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
Year of discovery: 2023 (radial velocity)
Other designations of this exoplanet
TYC 4516-2147-1 b, USNO-A2 1650-00599936 b, HR 881 b, HIP 14417 b, TIC 297820335 b, 2MASS J03060788+7925066 b
TYC 4516-2147-1 b, USNO-A2 1650-00599936 b, HR 881 b, HIP 14417 b, TIC 297820335 b, 2MASS J03060788+7925066 b
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HD 18438 system structure
Exoplanet HD 18438 b orbits star HD 18438, which has bigger mass than Sun. It is the only known exoplanet orbiting this star
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HD 18438 | ||||||||
| HD 18438 b | 2.1 AU | 6676 M⊕ | 803 days | ||||||
Comparison
When comparing to the Solar system planets, HD 18438 b has % of mass of and it orbits its star between distances of Mars and Jupiter from the Sun.
| Mercury | Venus | Earth | Mars | Jupiter | Saturn | Uranus | Neptune | ||
|---|---|---|---|---|---|---|---|---|---|
|
Mass | 121382.67 | 8191.47 | 6676.05 | 60691.34 | 21.01 | 70.13 | 457.26 | 388.14 |
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Distance | 5.38 | 2.9 | 2.1 | 1.38 | 0.4 | 0.22 | 0.11 | 0.07 |
Habitability
Habitable zone of the star: 37.6 - 54.2 AU
The planet is too hot to sustain liquid water.
News from this star system
20. 03 2023
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